Bug fixes:

--Disallow the use of synth when randomly generating xforms if the user has an Nvidia device present on their system.

Code changes:
--Use some CPU defines in CL code.
--Change curves color scaling buffer to be 2^16 per channel instead of 2^17 which was probably overkill.
--Code in RendererClDevice::Init() to detect Nvidia was wrong even thought it technically worked.

Source/EmberCL/RendererCL.cpp

@@ -630,6 +630,20 @@ bool RendererCL<T, bucketT>::RandVec(vector<QTIsaac<ISAAC_SIZE, ISAAC_INT>>& ran
 	return b;
 }
 
+/// <summary>
+/// Get whether any devices are from Nvidia.
+/// </summary>
+/// <returns>True if an devices are from Nvidia, else false.</returns>
+template <typename T, typename bucketT>
+bool RendererCL<T, bucketT>::AnyNvidia() const
+{
+	for (auto& dev : m_Devices)
+		if (dev->Nvidia())
+			return true;
+
+	return false;
+}
+
 /// <summary>
 /// Protected virtual functions overridden from Renderer.
 /// </summary>