updated for version 7.3.988

Problem:    New regexp engine is slow.
Solution:   Break out of the loop when the state list is empty.

src/version.c

@@ -728,6 +728,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    988,
 /**/
     987,
 /**/