Pacify GCC 12 false positive in ccl.c

* src/ccl.c: Suppress -Wanalyzer-use-of-uninitialized-value
in GCC 12 or later.

src/ccl.c

@@ -35,6 +35,11 @@ along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
 #include "coding.h"
 #include "keyboard.h"
 
+/* Avoid GCC 12 bug <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105784>.  */
+#if GNUC_PREREQ (12, 0, 0)
+# pragma GCC diagnostic ignored "-Wanalyzer-use-of-uninitialized-value"
+#endif
+
 /* Table of registered CCL programs.  Each element is a vector of
    NAME, CCL_PROG, RESOLVEDP, and UPDATEDP, where NAME (symbol) is the
    name of the program, CCL_PROG (vector) is the compiled code of the