Merge some code from hlsdk2.4.

dlls/weapons.cpp

@@ -601,6 +601,11 @@ void CBasePlayerWeapon::ItemPostFrame( void )
 		m_fInReload = FALSE;
 	}
 
+	if( !( m_pPlayer->pev->button & IN_ATTACK ) )
+	{
+		m_flLastFireTime = 0.0f;
+	}
+
 	if( ( m_pPlayer->pev->button & IN_ATTACK2 ) && CanAttack( m_flNextSecondaryAttack, gpGlobals->time, UseDecrement() ) )
 	{
 		if( pszAmmo2() && !m_pPlayer->m_rgAmmo[SecondaryAmmoIndex()] )
@@ -932,6 +937,7 @@ BOOL CBasePlayerWeapon::DefaultDeploy( char *szViewModel, char *szWeaponModel, i
 
 	m_pPlayer->m_flNextAttack = UTIL_WeaponTimeBase() + 0.5;
 	m_flTimeWeaponIdle = UTIL_WeaponTimeBase() + 1.0;
+	m_flLastFireTime = 0.0f;
 
 	return TRUE;
 }