Do not override IsUseable for mp5. Merge a9b1d9cda8.

dlls/mp5.cpp

@@ -270,12 +270,6 @@ void CMP5::WeaponIdle( void )
 	m_flTimeWeaponIdle = UTIL_SharedRandomFloat( m_pPlayer->random_seed, 10, 15 ); // how long till we do this again.
 }
 
-BOOL CMP5::IsUseable()
-{
-	//Can be used if the player has AR grenades. - Solokiller
-	return CBasePlayerWeapon::IsUseable() || m_pPlayer->m_rgAmmo[m_iSecondaryAmmoType] > 0;
-}
-
 class CMP5AmmoClip : public CBasePlayerAmmo
 {
 	void Spawn( void )

dlls/weapons.cpp

@@ -897,17 +897,39 @@ BOOL CBasePlayerWeapon::AddSecondaryAmmo( int iCount, char *szName, int iMax )
 //=========================================================
 BOOL CBasePlayerWeapon::IsUseable( void )
 {
-	if( m_iClip <= 0 )
+	if( m_iClip > 0 )
 	{
-		if( m_pPlayer->m_rgAmmo[PrimaryAmmoIndex()] <= 0 && iMaxAmmo1() != -1 )			
+		return TRUE;
+	}
+
+	// Player has unlimited ammo for this weapon or does not use magazines
+	if( iMaxAmmo1() == WEAPON_NOCLIP )
 	{
-			// clip is empty (or nonexistant) and the player has no more ammo of this type. 
-			return FALSE;
+		return TRUE;
+	}
+
+	if( m_pPlayer->m_rgAmmo[PrimaryAmmoIndex()] > 0 )
+	{
+		return TRUE;
 	}
+
+	if( pszAmmo2() )
+	{
+		// Player has unlimited ammo for this weapon or does not use magazines
+		if( iMaxAmmo2() == WEAPON_NOCLIP )
+		{
+			return TRUE;
 		}
 
+		if( m_pPlayer->m_rgAmmo[SecondaryAmmoIndex()] > 0 )
+		{
 			return TRUE;
 		}
+	}
+
+	// clip is empty (or nonexistant) and the player has no more ammo of this type. 
+	return FALSE;
+}
 
 BOOL CBasePlayerWeapon::CanDeploy( void )
 {

dlls/weapons.h

@@ -568,7 +568,6 @@ public:
 	BOOL Deploy( void );
 	void Reload( void );
 	void WeaponIdle( void );
-	BOOL IsUseable();
 	float m_flNextAnimTime;
 	int m_iShell;