patch 7.4.737

Problem:    On MS-Windows vimgrep over arglist doesn't work (Issue 361)
Solution:   Only escape backslashes in ## expansion when it is not used as the
            path separator. (James McCoy)

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    737,
 /**/
     736,
 /**/