patch 8.0.1546: using feedkeys() in a terminal may trigger mappings

Problem:    Using feedkeys() in a terminal window may trigger mappings.
            (Charles Sheridan)
Solution:   Avoid triggering a mapping when peeking for a key.

src/version.c

@@ -778,6 +778,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1546,
 /**/
     1545,
 /**/