add stop weld on door open

Author: anf3is

src/game/shared/swarm/asw_weapon_welder_shared.cpp

@@ -175,6 +175,7 @@ void CASW_Weapon_Welder::WeldDoor(bool bSeal)
 				else
 				{
 					pDoor->StopCloseForWeld( pMarine );
+					bWelding = false;
 				}
 #endif
 			}