patch 8.0.1136: W_WIDTH() is always the same

Problem:    W_WIDTH() is always the same.
Solution:   Expand the macro.
diff --git a/src/getchar.c b/src/getchar.c
index 179b2f3..ef42d9c 100644
--- a/src/getchar.c
+++ b/src/getchar.c
@@ -2666,8 +2666,8 @@
 					++col;
 				}
 				curwin->w_wrow = curwin->w_cline_row
-					   + curwin->w_wcol / W_WIDTH(curwin);
-				curwin->w_wcol %= W_WIDTH(curwin);
+					   + curwin->w_wcol / curwin->w_width;
+				curwin->w_wcol %= curwin->w_width;
 				curwin->w_wcol += curwin_col_off();
 #ifdef FEAT_MBYTE
 				col = 0;	/* no correction needed */
@@ -2684,7 +2684,7 @@
 			else if (curwin->w_p_wrap && curwin->w_wrow)
 			{
 			    --curwin->w_wrow;
-			    curwin->w_wcol = W_WIDTH(curwin) - 1;
+			    curwin->w_wcol = curwin->w_width - 1;
 #ifdef FEAT_MBYTE
 			    col = curwin->w_cursor.col - 1;
 #endif