Add default/null dpiScale for other apis

src/d3d/d3ddevice.cpp

@@ -2003,6 +2003,7 @@ Device renderdevice = {
 	d3d::im3DRenderPrimitive,
 	d3d::im3DRenderIndexedPrimitive,
 	d3d::im3DEnd,
+	null::dpiScale,
 	d3d::deviceSystem,
 };
 

src/ps2/ps2device.cpp

@@ -40,6 +40,7 @@ Device renderdevice = {
 	null::im3DRenderPrimitive,
 	null::im3DRenderIndexedPrimitive,
 	null::im3DEnd,
+	null::dpiScale,
 	null::deviceSystem
 };