patch 7.4.1942

Problem:    Background is not drawn properly when 'termguicolors' is set.
Solution:   Check cterm_normal_bg_color. (Jacob Niehus, closes #805)

src/version.c

@@ -753,6 +753,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1942,
 /**/
     1941,
 /**/