bump PHP API number.

This is so that we can work around the signature change in the get_method
overloaded object handler in our portable extensions.

Yes, you could argue that the zend api number needs bumping, but then you could
argue which one to bump, as neither of them is specific or generic enough.

Besides all that, the PHP API number really needs a good old bump anyway.

main/php.h

@@ -26,7 +26,7 @@
 #include <dmalloc.h>
 #endif
 
-#define PHP_API_VERSION 20031224
+#define PHP_API_VERSION 20041225
 #define PHP_HAVE_STREAMS
 #define YYDEBUG 0