tests: Fix build with older MSVC

Regressed in 9b5cce7.

Fixes #620.

Author: nwellnhof

runsuite.c

@@ -6,6 +6,7 @@
  * [email protected]
  */
 
+#include "config.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>

runtest.c

@@ -11,7 +11,7 @@
  * [email protected]
  */
 
-#include "config.h"
+#include "libxml.h"
 #include <stdio.h>
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>

runxmlconf.c

@@ -6,6 +6,7 @@
  * [email protected]
  */
 
+#include "config.h"
 #include <stdio.h>
 #include <libxml/xmlversion.h>
 

testapi.c

@@ -11,6 +11,7 @@
 /* Disable deprecation warnings */
 #define XML_DEPRECATED
 
+#include "config.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>

testrecurse.c

@@ -10,6 +10,7 @@
  * [email protected]
  */
 
+#include "config.h"
 #include <stdio.h>
 
 #include <stdlib.h>