patch 7.4.749

Problem:    For some options two consecutive commas are OK. (Nikolay Pavlov)
Solution:   Add the P_ONECOMMA flag.

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    749,
 /**/
     748,
 /**/