vim-patch:7.4.1979

Problem:    Getting value of binary option is wrong. (Kent Sibilev)
Solution:   Fix type cast.  Add a test.

2acfbed9db

src/nvim/option.c

@@ -4630,7 +4630,7 @@ get_option_value (
     if ((int *)varp == &curbuf->b_changed) {
       *numval = curbufIsChanged();
     } else {
-      *numval = (long) *(varnumber_T *)varp;
+      *numval = (long) *(int *)varp;
     }
   }
   return 1;