Do not generate shadow map code when there are no shadow maps

Fix shader compiler error if all shadow mapped lights are point lights

Samples/Media/Hlms/Pbs/Any/ShadowMapping_piece_vs.any

@@ -37,9 +37,11 @@
 		@end
 		@end
 	@else
-		@piece( DoShadowReceiveVS )
-			outVs.worldPos.xyz = worldPos.xyz;
-			@property( hlms_pssm_splits )outVs.depth = outVs_Position.z;@end
+		@property( hlms_num_shadow_map_lights && !hlms_all_point_lights )
+			@piece( DoShadowReceiveVS )
+				outVs.worldPos.xyz = worldPos.xyz;
+				@property( hlms_pssm_splits )outVs.depth = outVs_Position.z;@end
+			@end
 		@end
 	@end
 @end

Samples/Media/Hlms/Pbs/GLSL/Structs_piece_vs_piece_ps.glsl

@@ -232,7 +232,7 @@ layout_constbuffer(binding = 3) uniform ManualProbe
 				@end
 			@end
 		@else
-			@property( !hlms_all_point_lights )
+			@property( hlms_num_shadow_map_lights && !hlms_all_point_lights )
 				vec3 worldPos;
 			@end
 		@end

Samples/Media/Hlms/Pbs/HLSL/Structs_piece_vs_piece_ps.hlsl

@@ -231,7 +231,7 @@ cbuffer ManualProbe : register(b3)
 				@end
 			@end
 		@else
-			@property( !hlms_all_point_lights )
+			@property( hlms_num_shadow_map_lights && !hlms_all_point_lights )
 				float3 worldPos		: TEXCOORD@counter(texcoord);
 			@end
 		@end

Samples/Media/Hlms/Pbs/Metal/Structs_piece_vs_piece_ps.metal

@@ -240,7 +240,7 @@ struct Material
 				@end
 			@end
 		@else
-			@property( !hlms_all_point_lights )
+			@property( hlms_num_shadow_map_lights && !hlms_all_point_lights )
 				float3 worldPos;
 			@end
 		@end