Fix OpenCL render error in large scenes

In scenes such as Cosmos Laundromat, there were memory allocations bigger than
2GB which would overflow.

Problem and solution found by AMD, thanks!

1 files changed, 1 insertions, 1 deletions

diff --git a/intern/cycles/device/opencl/memory_manager.cpp b/intern/cycles/device/opencl/memory_manager.cpp
index 0285dc969ec..4330e07cb37 100644
--- a/intern/cycles/device/opencl/memory_manager.cpp
+++ b/intern/cycles/device/opencl/memory_manager.cpp
@@ -65,7 +65,7 @@ void MemoryManager::DeviceBuffer::update_device_memory(OpenCLDevice *device)
   }
 
   /* Always allocate non-empty buffer, NULL pointers cause problems with some drivers. */
-  total_size = max(total_size, 16);
+  total_size = std::max(total_size, (size_t)16);
 
   if (need_realloc) {
     cl_ulong max_buffer_size;