cvar is called fs_game (bug 4866)

code/sys/sys_unix.c

@@ -498,7 +498,7 @@ void Sys_ErrorDialog( const char *error )
 	unsigned int size;
 	int f = -1;
 	const char *homepath = Cvar_VariableString( "fs_homepath" );
-	const char *gamedir = Cvar_VariableString( "fs_gamedir" );
+	const char *gamedir = Cvar_VariableString( "fs_game" );
 	const char *fileName = "crashlog.txt";
 	char *ospath = FS_BuildOSPath( homepath, gamedir, fileName );