patch 8.1.0187: getwininfo() and win_screenpos() return different numbers

Problem:    getwininfo() and win_screenpos() return different numbers.
Solution:   Add one to "wincol" and "winrow" from getwininfo().
diff --git a/src/evalfunc.c b/src/evalfunc.c
index 13c60b9..2e06c20 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -5648,12 +5648,12 @@
     dict_add_number(dict, "winnr", winnr);
     dict_add_number(dict, "winid", wp->w_id);
     dict_add_number(dict, "height", wp->w_height);
-    dict_add_number(dict, "winrow", wp->w_winrow);
+    dict_add_number(dict, "winrow", wp->w_winrow + 1);
 #ifdef FEAT_MENU
     dict_add_number(dict, "winbar", wp->w_winbar_height);
 #endif
     dict_add_number(dict, "width", wp->w_width);
-    dict_add_number(dict, "wincol", wp->w_wincol);
+    dict_add_number(dict, "wincol", wp->w_wincol + 1);
     dict_add_number(dict, "bufnr", wp->w_buffer->b_fnum);
 
 #ifdef FEAT_TERMINAL