patch 7.4.1631

Problem:    Compiler doesn't understand switch on all enum values. (Tony
            Mechelynck)
Solution:   Initialize variable.

src/version.c

@@ -748,6 +748,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1631,
 /**/
     1630,
 /**/