Restricts minimum texture size to fix crash during division by zero

- restricts minimum texture size to 128 sprites wide and 256 sprites high;
- adds debug message about 0 `max_texture`-dimensions.

Fixes CleverRaven#22596

src/cata_tiles.cpp

@@ -425,6 +425,19 @@ void tileset_loader::load_tileset( std::string img_path )
     info.max_texture_height = sprite_height * 20 + 1;
 #endif
 
+    const int min_tile_xcount = 128;
+    const int min_tile_ycount = min_tile_xcount * 2;
+
+    if( info.max_texture_width == 0 ){
+        info.max_texture_width = sprite_width * min_tile_xcount;
+        DebugLog( D_INFO, DC_ALL ) << "SDL_RendererInfo max_texture_width was set to 0.  Changing it to " << info.max_texture_width;
+    }
+
+    if( info.max_texture_height == 0 ){
+        info.max_texture_height = sprite_height * min_tile_ycount;
+        DebugLog( D_INFO, DC_ALL ) << "SDL_RendererInfo max_texture_height was set to 0.  Changing it to " << info.max_texture_height;
+    }
+
     // Number of tiles in each dimension that fits into a (maximal) SDL texture.
     // If the tile atlas contains more than that, we have to split it.
     const int max_tile_xcount = info.max_texture_width / sprite_width;