Remove the /DNDEBUG substring

Author: michaelbautin

CMakeLists.txt

@@ -135,7 +135,7 @@ else()
 endif()
 
 # Turn on assertions in the RelWithDebInfo build type.
-foreach(NDEBUG_FLAG_STR IN ITEMS "/D NDEBUG" "-DNDEBUG")
+foreach(NDEBUG_FLAG_STR IN ITEMS "/DNDEBUG" "/D NDEBUG" "-DNDEBUG")
     string(REPLACE "${NDEBUG_FLAG_STR}" "" CMAKE_CXX_FLAGS_RELWITHDEBINFO
            "${CMAKE_CXX_FLAGS_RELWITHDEBINFO}")
     # TODO: this should not be necessary.