To avoid zero-vector begin iterator dereference (this is undefined behaviour as zero-vector begin==end).

Author: intorr

src/xrEngine/pure.h

@@ -114,7 +114,8 @@ class CRegistrator // the registrator itself
     };
     void Resort(void)
     {
-        qsort(&*R.begin(), R.size(), sizeof(_REG_INFO), _REG_Compare);
+        if (R.size())
+            qsort(&*R.begin(), R.size(), sizeof(_REG_INFO), _REG_Compare);
         while ((R.size()) && (R[R.size() - 1].Prio == REG_PRIORITY_INVALID))
             R.pop_back();
         if (R.empty())

src/xrGame/NET_Queue.h

@@ -65,7 +65,8 @@ class NET_Event
     }
     void implication(NET_Packet& P) const
     {
-        CopyMemory(P.B.data, &*data.begin(), (u32)data.size());
+        if (data.size())
+            CopyMemory(P.B.data, &*data.begin(), (u32)data.size());
         P.B.count = (u32)data.size();
         P.r_pos = 0;
     }