unset CMAKE_DEFAULT_BUILD_TYPE for visual studio generator

Author: yohjimane

cmake/XRay.Configurations.cmake

@@ -18,6 +18,9 @@ if (is_multi_config)
         message(WARNING "CMAKE_BUILD_TYPE is ignored with multi-config generator.")
         unset(CMAKE_BUILD_TYPE)
     endif()
+    if (CMAKE_GENERATOR MATCHES "Visual Studio")
+        unset(CMAKE_DEFAULT_BUILD_TYPE)
+    endif()
 else()
     message(DEBUG "CMAKE_BUILD_TYPE: ${CMAKE_BUILD_TYPE}")
     if (NOT CMAKE_BUILD_TYPE)