patch 8.0.0448: some macros are in lower case

Problem:    Some macros are in lower case, which can be confusing.
Solution:   Make a few lower case macros upper case.
diff --git a/src/gui_beval.c b/src/gui_beval.c
index dd61945..c06e75a 100644
--- a/src/gui_beval.c
+++ b/src/gui_beval.c
@@ -84,7 +84,7 @@
 	    result = eval_to_string(bexpr, NULL, TRUE);
 
 	    /* Remove one trailing newline, it is added when the result was a
-	     * list and it's hardly every useful.  If the user really wants a
+	     * list and it's hardly ever useful.  If the user really wants a
 	     * trailing newline he can add two and one remains. */
 	    if (result != NULL)
 	    {
@@ -366,7 +366,7 @@
 
 		    if (VIsual_active)
 		    {
-			if (lt(VIsual, curwin->w_cursor))
+			if (LT_POS(VIsual, curwin->w_cursor))
 			{
 			    spos = &VIsual;
 			    epos = &curwin->w_cursor;