(svn r6923) -Codechange: Load nsignalsw.grf in the same way as other mandatory additional grfs

gfxinit.c

@@ -21,7 +21,7 @@ typedef struct MD5File {
 } MD5File;
 
 typedef struct FileList {
-	const MD5File basic[5];     // grf files that always have to be loaded
+	const MD5File basic[4];     // grf files that always have to be loaded
 	const MD5File landscape[3]; // landscape specific grf files
 } FileList;
 
@@ -344,6 +344,9 @@ static void LoadSpriteTables(void)
 		);
 	}
 
+	assert(load_index == SPR_SIGNALS_BASE);
+	load_index += LoadGrfFile("nsignalsw.grf", load_index, i++);
+
 	assert(load_index == SPR_CANALS_BASE);
 	load_index += LoadGrfFile("canalsw.grf", load_index, i++);