wsl/hsakmt: Fix memory leak in WDDMDevice::CreateGpuMemory

Signed-off-by: lyndonli <Lyndon.Li@amd.com>
Reviewed-by: Longlong Yao <Longlong.Yao@amd.com>
Part-of: <http://10.67.69.192/wsl/libhsakmt/-/merge_requests/4>

wddm/device.cpp

@@ -445,6 +445,8 @@ ErrorCode WDDMDevice::CreateGpuMemory(const GpuMemoryCreateInfo &create_info, Gp
     ret = mem->Init(create_info);
   if (ret == ErrorCode::Success)
     *gpu_mem = mem;
+  else
+    delete mem;
 
   return ret;
 }