shader: lower bounded UInt formatted buffer copies to shared stores

src/graphics/shader/recompiler/ir/ShaderIR.h

@@ -521,6 +521,7 @@ struct DescriptorSource {
 		uint32_t table_record_bytes = 0;
 		bool     table_scalar = false;
 		bool     indexed_store = false;
+		bool     signed_count = false;
 		uint32_t workgroup_axis  = UINT32_MAX;
 		Value    key_count;
 		// First selector index, or first descriptor key for a direct or bitmap range.