game\server: ent_set_name should work with 1 or 2 args

See
ValveSoftware/source-sdk-2013#1217
ValveSoftware/source-sdk-2013#1221

Author: dimhotepus

game/server/baseentity.cpp

@@ -5208,7 +5208,8 @@ void CC_Ent_SetName( const CCommand& args )
 {
 	CBaseEntity *pEntity = NULL;
 
-	if ( args.ArgC() < 1 )
+	// dimhotepus: Should be at least 1 argument.
+	if ( args.ArgC() < 2 )
 	{
 		CBasePlayer *pPlayer = ToBasePlayer( UTIL_GetCommandClient() );
 		if (!pPlayer)
@@ -5229,14 +5230,22 @@ void CC_Ent_SetName( const CCommand& args )
 			CBaseEntity *ent = NULL;
 			while ( (ent = gEntList.NextEnt(ent)) != NULL )
 			{
-				if (  (ent->GetEntityName() != NULL_STRING	&& FStrEq(args[1], STRING(ent->GetEntityName())))	|| 
-					  (ent->m_iClassname != NULL_STRING	&& FStrEq(args[1], STRING(ent->m_iClassname))) ||
-					  (ent->GetClassname()!=NULL && FStrEq(args[1], ent->GetClassname())))
+				// dimhotepus: Honor second arg for entity name
+				if (  (ent->GetEntityName() != NULL_STRING	&& FStrEq(args[2], STRING(ent->GetEntityName())))	|| 
+					  (ent->m_iClassname != NULL_STRING	&& FStrEq(args[2], STRING(ent->m_iClassname))) ||
+					  (ent->GetClassname()!=NULL && FStrEq(args[2], ent->GetClassname())))
 				{
 					pEntity = ent;
 					break;
 				}
 			}
+
+			if ( !pEntity )
+			{
+				// dimhotepus: Notify if we don't set the name.
+				Warning( "No such entity with name %s found to set new name for.\n", args[2] );
+				return;
+			}
 		}
 
 		// Found one?