game: make Lua ent create no longer set a static classname (see script

create), fix possible crash

src/game/g_lua.c

@@ -1313,7 +1313,7 @@ gentity_t *G_Lua_CreateEntity(char *params)
 		if (level.numSpawnVars == MAX_SPAWN_VARS)
 		{
 			// see above note
-			G_Printf("%s API: can't spawn and entity - MAX_SPAWN_VARS reached.\n", LUA_VERSION);
+			G_Printf("%s API: can't spawn an entity - MAX_SPAWN_VARS reached.\n", LUA_VERSION);
 			return NULL;
 		}
 
@@ -1324,7 +1324,12 @@ gentity_t *G_Lua_CreateEntity(char *params)
 	}
 	create = G_SpawnGEntityFromSpawnVars();
 
-	create->classname = "lua_spawn"; // make additional param?
+	//create->classname = "lua_spawn"; // make additional param?
+
+	if (!create)  // don't link NULL ents
+	{
+		return NULL;
+	}
 
 	trap_LinkEntity(create);
 	return create;

src/game/g_script.c

@@ -594,6 +594,8 @@ void G_Script_ScriptParse(gentity_t *ent)
 		{
 			if (wantScript)
 			{
+				// note: There are maps available which don't start anymore
+				//       Fix the mapscripts!
 				G_Error("G_Script_ScriptParse(), Error (line %d): '{' expected, but found '%s'.\n", COM_GetCurrentParseLine(), token);
 			}
 

src/game/g_script_actions.c

@@ -5137,6 +5137,11 @@ qboolean G_ScriptAction_Create(gentity_t *ent, char *params)
 	}
 	create = G_SpawnGEntityFromSpawnVars();
 
+	if (!create)
+	{
+		return qfalse; // don't link NULL ents
+	}
+
 	trap_LinkEntity(create);
 	return qtrue;
 }

src/game/g_spawn.c

@@ -802,6 +802,8 @@ gentity_t *G_SpawnGEntityFromSpawnVars(void)
 	G_SpawnInt("notteam", "0", &i);
 	if (i)
 	{
+		G_Printf("G_SpawnGEntityFromSpawnVars Warning: Can't spawn entity in team games - returning NULL\n");
+
 		G_FreeEntity(ent);
 		return NULL;
 	}