Add a couple of extra protection checks in D3D12 code against crashes

renderdoc/driver/d3d12/d3d12_common.h

@@ -65,7 +65,8 @@ void D3D12_CleanupReplaySDK();
 
 inline void SetObjName(ID3D12Object *obj, const rdcstr &utf8name)
 {
-  obj->SetName(StringFormat::UTF82Wide(utf8name).c_str());
+  if(obj)
+    obj->SetName(StringFormat::UTF82Wide(utf8name).c_str());
 }
 
 #define PIX_EVENT_UNICODE_VERSION 0

renderdoc/driver/d3d12/d3d12_device.cpp

@@ -1750,6 +1750,12 @@ bool WrappedID3D12Device::Serialise_MapDataWrite(SerialiserType &ser, ID3D12Reso
     {
       ID3D12Resource *uploadBuf = GetUploadBuffer(cmd.m_CurChunkOffset, rangeSize);
 
+      if(uploadBuf)
+      {
+        RDCERR("Couldn't get upload buffer");
+        return false;
+      }
+
       SetObjName(uploadBuf,
                  StringFormat::Fmt("Map data write, %llu bytes for %s/%u @ %llu", rangeSize,
                                    ToStr(origid).c_str(), Subresource, cmd.m_CurChunkOffset));