patch 9.0.0456: function called at debug prompt is also debugged

Problem:    Function called at debug prompt is also debugged.
Solution:   Reset the debug level while entering the debug command.
            (closes #11118)

src/version.c

@@ -703,6 +703,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    456,
 /**/
     455,
 /**/