patch 8.1.0989: various small code ugliness

Problem:    Various small code ugliness.
Solution:   Remove pointless NULL checks. Fix function calls. Fix typos.
            (Dominique Pelle, closes #4060)
diff --git a/src/globals.h b/src/globals.h
index 729a269..9cc577b 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -426,7 +426,7 @@
 # if defined(FEAT_MOUSE_DEC)
 /*
  * When the DEC mouse has been pressed but not yet released we enable
- * automatic querys for the mouse position.
+ * automatic queries for the mouse position.
  */
 EXTERN int	WantQueryMouse INIT(= FALSE);
 # endif