GH-454 More fixes to address 'no code before declaration' warnings.

Fix additional cases with code before variable declarations. These were added
before the longer commit by bulk88 which fixed a lot of previously existing
cases.

Note that Perl 5.35.5 and later relax this requirement because 5.35.5 and later
versions use some of C99 (C standard ISO/IEC 9899:1999) features.

Gcc and Clang flag -Werror=declaration-after-statement is especially mentioned
as something that should only be used with Perl versions earlier than 5.35.5.

https://perldoc.perl.org/5.35.5/perldelta#Configuration-and-Compilation

SSLeay.xs currently avoids code before declarations.

Changes

@@ -134,6 +134,13 @@ Revision history for Perl extension Net::SSLeay.
 	  related functions.
 	- Support finding OpenSSL libraries using
 	  ExtUtils::PkgConfig. Thanks to Paul Howarth for the patch.
+	- Fix a number of cases where variables were declared after
+	  code triggering Gcc and Clang warning
+	  -Wdeclaration-after-statement. This is supported by C
+	  language version C99 and used by Perl 5.35.5 and
+	  later. SSLeay.xs is likely compiled with compilers that do
+	  not support this, therefore such constructs are avoided in
+	  SSLeay.xs. Thanks to GitHub user bulk88 for the patch.
 
 1.93_02 2023-02-22
 	- Update ppport.h to version 3.68. This eliminates thousands of

SSLeay.xs

@@ -2997,8 +2997,9 @@ SSL_has_pending(s)
 #ifdef NET_SSLEAY_32BIT_INT_PERL
 int
 OPENSSL_init_ssl(double opts, SV *sv_settings = &PL_sv_undef)
-    CODE:
+    PREINIT:
 	const OPENSSL_INIT_SETTINGS *settings = NULL;
+    CODE:
 	if (sv_settings != &PL_sv_undef)
 	    settings = INT2PTR(OPENSSL_INIT_SETTINGS *, SvIV(sv_settings));
 	RETVAL = OPENSSL_init_ssl(opts, settings);
@@ -3007,8 +3008,9 @@ OPENSSL_init_ssl(double opts, SV *sv_settings = &PL_sv_undef)
 
 int
 OPENSSL_init_crypto(double opts, SV *sv_settings = &PL_sv_undef)
-    CODE:
+    PREINIT:
 	const OPENSSL_INIT_SETTINGS *settings = NULL;
+    CODE:
 	if (sv_settings != &PL_sv_undef)
 	    settings = INT2PTR(OPENSSL_INIT_SETTINGS *, SvIV(sv_settings));
 	RETVAL = OPENSSL_init_crypto(opts, settings);
@@ -3018,8 +3020,9 @@ OPENSSL_init_crypto(double opts, SV *sv_settings = &PL_sv_undef)
 #else
 int
 OPENSSL_init_ssl(uint64_t opts, SV *sv_settings = &PL_sv_undef)
-    CODE:
+    PREINIT:
 	const OPENSSL_INIT_SETTINGS *settings = NULL;
+    CODE:
 	if (sv_settings != &PL_sv_undef)
 	    settings = INT2PTR(OPENSSL_INIT_SETTINGS *, SvIV(sv_settings));
 	RETVAL = OPENSSL_init_ssl(opts, settings);
@@ -3028,8 +3031,9 @@ OPENSSL_init_ssl(uint64_t opts, SV *sv_settings = &PL_sv_undef)
 
 int
 OPENSSL_init_crypto(uint64_t opts, SV *sv_settings = &PL_sv_undef)
-    CODE:
+    PREINIT:
 	const OPENSSL_INIT_SETTINGS *settings = NULL;
+    CODE:
 	if (sv_settings != &PL_sv_undef)
 	    settings = INT2PTR(OPENSSL_INIT_SETTINGS *, SvIV(sv_settings));
 	RETVAL = OPENSSL_init_crypto(opts, settings);
@@ -8656,8 +8660,9 @@ OSSL_LIB_CTX_get0_global_default()
 
 OSSL_PROVIDER *
 OSSL_PROVIDER_load(SV *libctx, const char *name)
-    CODE:
+    PREINIT:
         OSSL_LIB_CTX *ctx = NULL;
+    CODE:
         if (libctx != &PL_sv_undef)
 	    ctx = INT2PTR(OSSL_LIB_CTX *, SvIV(libctx));
         RETVAL = OSSL_PROVIDER_load(ctx, name);
@@ -8668,8 +8673,9 @@ OSSL_PROVIDER_load(SV *libctx, const char *name)
 
 OSSL_PROVIDER *
 OSSL_PROVIDER_try_load(SV *libctx, const char *name, int retain_fallbacks)
-    CODE:
+    PREINIT:
         OSSL_LIB_CTX *ctx = NULL;
+    CODE:
         if (libctx != &PL_sv_undef)
 	    ctx = INT2PTR(OSSL_LIB_CTX *, SvIV(libctx));
         RETVAL = OSSL_PROVIDER_try_load(ctx, name, retain_fallbacks);
@@ -8683,8 +8689,9 @@ OSSL_PROVIDER_unload(OSSL_PROVIDER *prov)
 
 int
 OSSL_PROVIDER_available(SV *libctx, const char *name)
-    CODE:
+    PREINIT:
         OSSL_LIB_CTX *ctx = NULL;
+    CODE:
         if (libctx != &PL_sv_undef)
 	    ctx = INT2PTR(OSSL_LIB_CTX *, SvIV(libctx));
         RETVAL = OSSL_PROVIDER_available(ctx, name);
@@ -8695,8 +8702,8 @@ int
 OSSL_PROVIDER_do_all(SV *libctx, SV *perl_cb, SV *perl_cbdata = &PL_sv_undef)
     PREINIT:
         simple_cb_data_t* cbdata = NULL;
-    CODE:
         OSSL_LIB_CTX *ctx = NULL;
+    CODE:
         if (libctx != &PL_sv_undef)
 	    ctx = INT2PTR(OSSL_LIB_CTX *, SvIV(libctx));