[Bugfix] Crows fix

1) After crow's death (from actor's hit or blowout) it falls to ground. But after game save\load it 'resurrects'. The problem is that it flying in semi-dead state (health is 0, but state is Flying). When you hits it, Die() methot is not called (dead object can't die twice), so physics shell isn't created. Crow freezes  at the last point in the sky.
2) Because of unitualized members flight of crows could be incorrect in some conditions.

src/xrGame/ai/crow/ai_crow.cpp

@@ -100,6 +100,8 @@ void CAI_Crow::init()
     fIdleSoundDelta = 10.f;
     fIdleSoundTime = fIdleSoundDelta;
     bPlayDeathIdle = false;
+    o_workload_frame = 0;
+    o_workload_rframe = 0;
 }
 
 void CAI_Crow::Load(LPCSTR section)
@@ -143,8 +145,25 @@ BOOL CAI_Crow::net_Spawn(CSE_Abstract* DC)
     m_Anims.m_fly.Load(M, "fly_fwd");
     m_Anims.m_idle.Load(M, "fly_idle");
 
-    // disable UpdateCL, enable only on HIT
-    processing_deactivate();
+    o_workload_frame = 0;
+    o_workload_rframe = 0;
+
+    if (GetfHealth() > 0)
+    {
+        st_current = eFlyIdle;
+        st_target = eFlyIdle;
+        // disable UpdateCL, enable only on HIT
+        processing_deactivate();
+    }
+    else
+    {
+        st_current = eDeathFall;
+        st_target = eDeathDead;
+        // Crow is already dead, need to enable physics
+        processing_activate();
+        CreateSkeleton();
+    }
+
     VERIFY2(valid_pos(Position()), dbg_valide_pos_string(Position(), this, "CAI_Crow::net_Spawn"));
     return R;
 }