patch 8.0.1135: W_WINCOL() is always the same

Problem:    W_WINCOL() is always the same.
Solution:   Expand the macro.
diff --git a/src/edit.c b/src/edit.c
index 447e2ee..8486e34 100644
--- a/src/edit.c
+++ b/src/edit.c
@@ -1776,7 +1776,7 @@
 	else
 	    attr = 0;
 	pc_row = W_WINROW(curwin) + curwin->w_wrow;
-	pc_col = W_WINCOL(curwin);
+	pc_col = curwin->w_wincol;
 #if defined(FEAT_RIGHTLEFT) || defined(FEAT_MBYTE)
 	pc_status = PC_STATUS_UNSET;
 #endif