patch 7.4.843

Problem:    Still possible to go beyond the end of a string.
Solution:   Check for NUL also in second string. (Dominique Pelle)

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    843,
 /**/
     842,
 /**/