Fix ZTS RELEASE for date ext

Author: Girgias

ext/date/php_date.c

@@ -795,8 +795,8 @@ static zend_string *date_format(char *format, size_t format_len, timelib_time *t
 			offset->offset = (t->z);
 			offset->leap_secs = 0;
 			offset->is_dst = 0;
-			offset->abbr = timelib_malloc(9); /* GMT±xxxx\0 */
-			snprintf(offset->abbr, 9, "GMT%c%02d%02d",
+			offset->abbr = timelib_malloc(13); /* GMT±xxxx\0 */
+			snprintf(offset->abbr, 13, "GMT%c%02d%02d",
 			                          (offset->offset < 0) ? '-' : '+',
 			                          abs(offset->offset / 3600),
 			                          abs((offset->offset % 3600) / 60));
@@ -1007,8 +1007,8 @@ PHPAPI int php_idate(char format, time_t ts, int localtime)
 			offset->offset = (t->z + (t->dst * 3600));
 			offset->leap_secs = 0;
 			offset->is_dst = t->dst;
-			offset->abbr = timelib_malloc(9); /* GMT±xxxx\0 */
-			snprintf(offset->abbr, 9, "GMT%c%02d%02d",
+			offset->abbr = timelib_malloc(13); /* GMT±xxxx\0 */
+			snprintf(offset->abbr, 13, "GMT%c%02d%02d",
 			                          (offset->offset < 0) ? '-' : '+',
 			                          abs(offset->offset / 3600),
 			                          abs((offset->offset % 3600) / 60));