Fix warning: 'status' may be used uninitialized in this function

Author: remicollet

php_memcached.c

@@ -1545,6 +1545,7 @@ static void php_memc_store_impl(INTERNAL_FUNCTION_PARAMETERS, int op, zend_bool
 
 		default:
 			/* not reached */
+			status = 0;
 			assert(0);
 			break;
 	}