Misc warning fixes

glib/pcre/pcre_ucp_search_funcs.c, glib/pcre/pcre_valid_utf8.c: add
back missing config.h includes, and this time add them to the copies
in glib/update-pcre/ too so they don't get lost again on the next PCRE
update.

glib/garray.c, glib/gbase64.c: fix signed/unsigned pointer casts

gio/xdgmime/xdgmimeglob.c: remove unused variable

gio/tests/live-g-file.c: fix printf args on x86_64

tests/Makefile.am, tests/regex-test.c: remove redundant -DENABLE_REGEX

glib/update-pcre/pcre_ucp_searchfuncs.c

@@ -43,6 +43,10 @@ POSSIBILITY OF SUCH DAMAGE.
 /* This module contains code for searching the table of Unicode character
 properties. */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include "pcre_internal.h"
 
 #include "ucp.h"               /* Category definitions */

glib/update-pcre/pcre_valid_utf8.c

@@ -1,3 +1,4 @@
+#include "config.h"
 #include "pcre_internal.h"
 
 /*