Make Team Arena pk3 error show when missing all pk3 files

The error was only displayed for Team Arena if one of the Team Arena pk3s
were found. Fix it to be display when trying to run Team Arena even with
no Team Arena pk3s present.

code/qcommon/files.c

@@ -3685,7 +3685,8 @@ static void FS_CheckPak0( void )
 		Com_Error(ERR_FATAL, "%s", errorText);
 	}
 
-	if(!com_standalone->integer && foundTA && (foundTA & ((1<<NUM_TA_PAKS)-1)) != ((1<<NUM_TA_PAKS)-1))
+	if(!com_standalone->integer && (foundTA & ((1<<NUM_TA_PAKS)-1)) != ((1<<NUM_TA_PAKS)-1)
+			&& (!Q_stricmp(fs_gamedirvar->string, BASETA) || !Q_stricmp(fs_basegame->string, BASETA)))
 	{
 		char errorText[MAX_STRING_CHARS] = "";