(svn r5944) -Merge TGP (r5578, r5579, r5724, r5726): -Feature: filter for textboxes to only

allow certain patterns (like numbers only)

newgrf_text.c

@@ -164,7 +164,7 @@ static void TranslateTTDPatchCodes(char *str)
 			case 0x98: *c = 31; break;
 			default:
 				/* Validate any unhandled character */
-				if (!IsValidAsciiChar(*c)) *c = '?';
+				if (!IsValidAsciiChar(*c, CS_ALPHANUMERAL)) *c = '?';
 				break;
 		}
 	}