Fix a thing where the host adds a WAD and you have too many WADs loaded to add it.

src/d_netcmd.c

@@ -3180,10 +3180,15 @@ static void Got_Addfilecmd(UINT8 **cp, INT32 playernum)
 
 	ncs = findfile(filename,md5sum,true);
 
-	if (ncs != FS_FOUND)
+	if (ncs != FS_FOUND || !P_AddWadFile(filename, NULL))
 	{
 		Command_ExitGame_f();
-		if (ncs == FS_NOTFOUND)
+		if (ncs == FS_FOUND)
+		{
+			CONS_Printf(M_GetText("The server tried to add %s,\nbut you have too many files added.\nRestart the game to clear loaded files\nand play on this server."), filename);
+			M_StartMessage(va("The server added a file \n(%s)\nbut you have too many files added.\nRestart the game to clear loaded files.\n\nPress ESC\n",filename), NULL, MM_NOTHING);
+		}
+		else if (ncs == FS_NOTFOUND)
 		{
 			CONS_Printf(M_GetText("The server tried to add %s,\nbut you don't have this file.\nYou need to find it in order\nto play on this server."), filename);
 			M_StartMessage(va("The server added a file \n(%s)\nthat you do not have.\n\nPress ESC\n",filename), NULL, MM_NOTHING);
@@ -3201,7 +3206,6 @@ static void Got_Addfilecmd(UINT8 **cp, INT32 playernum)
 		return;
 	}
 
-	P_AddWadFile(filename, NULL);
 	G_SetGameModified(true);
 }