SDL rendering bug with different font sizes

[MattAmmann]

When the map font size differs from the interface font size, the screen does not refresh properly. This manifests itself after closing a UI window, and is almost unplayable as a result. I encountered the bug myself, and it is confirmed by Beanzy in this forum thread.

The issue does not occur when using the same font height & font width settings as your map_fontwidth and map_fontheight.

Here is what is inside my fonts.json file:
{ "fontblending" : false, "fontwidth" : 8, "fontheight" : 16, "fontsize" : 16, "typeface" : "Terminus", "map_fontwidth" : 16, "map_fontheight" : 16, "map_fontsize" : 16, "map_typeface" : "whitrabt", "overmap_fontwidth" : 16, "overmap_fontheight" : 16, "overmap_fontsize" : 16, "overmap_typeface" : "Terminus" }

The only workaround I have come up with so far is to open and close the map, which forces a complete screen redraw.

Reproduction Steps:

1. Open the inventory
2. Select an item
3. Press Escape twice to get back to the map
4. Examine any tile

Game Options
Display: Tested on all three display modes
Use Tiles: False
Software Rendering: Tested on both modes

Details
Build: Tiles 0.C-4624 (pre-compiled binary on 4/2/2016)
Platform: Windows 7 x64
Screenshot:

[lucianposton]

dupe of #15881 ?

[MattAmmann]

This looks to be a duplicate, yes. I searched open issues before submitting, but didn't find that one.