patch 7.4.1167

Problem:    No tests for "is" and "isnot" with the new variables.
Solution:   Add tests.

src/version.c

@@ -741,6 +741,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1167,
 /**/
     1166,
 /**/