patch 7.4.939

Problem:    Memory leak when encountering a syntax error.
Solution:   Free the memory. (Dominique Pelle)

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    939,
 /**/
     938,
 /**/