[Bugfix] Incorrect weapon weight calculation

1) Ammos in mag could have different types with different weight (especially for shotguns)
2) When grenade is loaded into the weapon, it weight should increase.

src/xrGame/Weapon.cpp

@@ -1746,13 +1746,20 @@ float CWeapon::Weight() const
         res += pSettings->r_float(GetSilencerName(), "inv_weight");
     }
 
-    if (iAmmoElapsed)
+    const char* last_type = nullptr;
+    float w = 0, bs = 0;
+    for (auto& c : m_magazine)
     {
-        float w = pSettings->r_float(m_ammoTypes[m_ammoType].c_str(), "inv_weight");
-        float bs = pSettings->r_float(m_ammoTypes[m_ammoType].c_str(), "box_size");
-
-        res += w * (iAmmoElapsed / bs);
+        // Usually ammos in mag have same type, use it to improve performance
+        if (last_type != c.m_ammoSect.c_str())
+        {
+            last_type = c.m_ammoSect.c_str();
+            w = pSettings->r_float(last_type, "inv_weight");
+            bs = pSettings->r_float(last_type, "box_size");
+        }
+        res += w / bs;
     }
+
     return res;
 }
 

src/xrGame/WeaponMagazinedWGrenade.cpp

@@ -744,6 +744,26 @@ void CWeaponMagazinedWGrenade::net_Import(NET_Packet& P)
     inherited::net_Import(P);
 }
 
+float CWeaponMagazinedWGrenade::Weight() const
+{
+    float res = inherited::Weight();
+
+    const char* last_type = nullptr;
+    float w = 0, bs = 0;
+    for (auto& c : m_magazine2)
+    {
+        // Usually ammos in mag have same type, use it to improve performance
+        if (last_type != c.m_ammoSect.c_str())
+        {
+            last_type = c.m_ammoSect.c_str();
+            w = pSettings->r_float(last_type, "inv_weight");
+            bs = pSettings->r_float(last_type, "box_size");
+        }
+        res += w / bs;
+    }
+    return res;
+}
+
 bool CWeaponMagazinedWGrenade::IsNecessaryItem(const shared_str& item_sect)
 {
     return (std::find(m_ammoTypes.begin(), m_ammoTypes.end(), item_sect) != m_ammoTypes.end() ||

src/xrGame/WeaponMagazinedWGrenade.h

@@ -55,6 +55,7 @@ class CWeaponMagazinedWGrenade : public CWeaponMagazined, public CRocketLauncher
     virtual bool GetBriefInfo(II_BriefInfo& info);
 
     virtual bool IsNecessaryItem(const shared_str& item_sect);
+    virtual float Weight() const;
 
     //виртуальные функции для проигрывания анимации HUD
     virtual void PlayAnimShow();