locale.c: Skip code if will be a no-op

The previous commits have fixed things up so that at this point in the
code nothing has changed, and if nothing will change, we can just return

locale.c

@@ -1696,13 +1696,13 @@ S_new_numeric(pTHX_ const char *newnum)
      *                  such platforms.
      */
 
-
-    /* Save the new name if it isn't the same as the previous one, if any */
-    if (strNE(PL_numeric_name, newnum)) {
-        Safefree(PL_numeric_name);
-        PL_numeric_name = savepv(newnum);
+    if (strEQ(PL_numeric_name, newnum)) {
+        return;
     }
 
+    Safefree(PL_numeric_name);
+    PL_numeric_name = savepv(newnum);
+
     /* We are in the underlying locale until changed at the end of this
      * function */
     PL_numeric_underlying = TRUE;