Font Crash gracious fallback

OpenRA.Game/Graphics/SpriteFont.cs

@@ -84,6 +84,7 @@ namespace OpenRA.Graphics
 				}
 
 				var g = glyphs[Pair.New(s, c)];
+				if (g.Sprite != null)
 					Game.Renderer.RgbaSpriteRenderer.DrawSprite(g.Sprite,
 						new float2(
 							(int)Math.Round(p.X * deviceScale + g.Offset.X, 0) / deviceScale,
@@ -135,8 +136,21 @@ namespace OpenRA.Graphics
 		}
 
 		GlyphInfo CreateGlyph(Pair<char, Color> c)
+		{
+			try
 			{
 				face.LoadChar(c.First, LoadFlags.Default, LoadTarget.Normal);
+			}
+			catch (FreeTypeException)
+			{
+				return new GlyphInfo
+				{
+					Sprite = null,
+					Advance = 0,
+					Offset = int2.Zero
+				};
+			}
+
 			face.Glyph.RenderGlyph(RenderMode.Normal);
 
 			var size = new Size((int)face.Glyph.Metrics.Width, (int)face.Glyph.Metrics.Height);