intl: Avoid -Wuse-after-free [BZ #26779]

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
(cherry picked from commit 7845064d2d)

intl/localealias.c

@@ -318,6 +318,14 @@ read_alias_file (const char *fname, int fname_len)
 
 		  if (string_space_act + alias_len + value_len > string_space_max)
 		    {
+#pragma GCC diagnostic push
+
+#if defined __GNUC__ && __GNUC__ >= 12
+  /* Suppress the valid GCC 12 warning until the code below is changed
+     to avoid using pointers to the reallocated block.  */
+#  pragma GCC diagnostic ignored "-Wuse-after-free"
+#endif
+
 		    /* Increase size of memory pool.  */
 		      size_t new_size = (string_space_max
 					 + (alias_len + value_len > 1024
@@ -351,6 +359,8 @@ read_alias_file (const char *fname, int fname_len)
 					   value, value_len);
 		  string_space_act += value_len;
 
+#pragma GCC diagnostic pop
+
 		  ++nmap;
 		  ++added;
 		}