Change mapgrd and mapbld funcs to be 0-indexed.

All the other dgn and map functions in Crawl are 0-indexed, so this makes
everything more consistent.

I've changed all the uses in the master branch, but if you're using these
functions in another branch (dpeg and due), then you'll need to adjust
all your coordinates to match.

1 files changed, 2 insertions, 2 deletions

diff --git a/crawl-ref/source/l_mapgrd.cc b/crawl-ref/source/l_mapgrd.cc
index efefb583c5..f3098cfc23 100644
--- a/crawl-ref/source/l_mapgrd.cc
+++ b/crawl-ref/source/l_mapgrd.cc
@@ -40,12 +40,12 @@ static char* mapgrd_glyph(lua_State *ls, int &col, int &row)
     col = mapc->col;
 
     map_lines &lines = mapc->map->map;
-    if (row < 1 || col < 1 || col > lines.width() || row > lines.height())
+    if (row < 0 || col < 0 || col >= lines.width() || row >= lines.height())
     {
         return (NULL);
     }
 
-    coord_def mc(col - 1, row - 1);
+    coord_def mc(col, row);
     return (&lines(mc));
 }