Fix a bug with extracting ammo from mp5 when argrenades are full

dlls/weapons.cpp

@@ -1099,13 +1099,13 @@ int CBasePlayerWeapon::ExtractAmmo( CBasePlayerWeapon *pWeapon )
 	{
 		// blindly call with m_iDefaultAmmo. It's either going to be a value or zero. If it is zero,
 		// we only get the ammo in the weapon's clip, which is what we want. 
-		iReturn = pWeapon->AddPrimaryAmmo( m_iDefaultAmmo, (char *)pszAmmo1(), iMaxClip(), iMaxAmmo1() );
+		iReturn |= pWeapon->AddPrimaryAmmo( m_iDefaultAmmo, (char *)pszAmmo1(), iMaxClip(), iMaxAmmo1() );
 		m_iDefaultAmmo = 0;
 	}
 
 	if( pszAmmo2() != NULL )
 	{
-		iReturn = pWeapon->AddSecondaryAmmo( 0, (char *)pszAmmo2(), iMaxAmmo2() );
+		iReturn |= pWeapon->AddSecondaryAmmo( 0, (char *)pszAmmo2(), iMaxAmmo2() );
 	}
 
 	return iReturn;