Bug#18374703 COMPILATION ERROR WITH -DENABLE_DEBUG_SYNC=0 AND -DWITH_DEBUG=ON

Post-push fix.
Problem cmake without explicit build type was broken on windows.
Fix: do not test for build type, always extend CMAKE_C[XX]_FLAGS_DEBUG

CMakeLists.txt

@@ -252,11 +252,9 @@ IF (WITH_ASAN)
   ENDIF()
 ENDIF()
 
-
-IF(CMAKE_BUILD_TYPE MATCHES "Debug" OR WITH_DEBUG)
-  SET(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -DENABLED_DEBUG_SYNC") 
-  SET(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -DENABLED_DEBUG_SYNC") 
-ENDIF() 
+# Always enable debug sync for debug builds.
+SET(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} -DENABLED_DEBUG_SYNC")
+SET(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -DENABLED_DEBUG_SYNC")
  
 OPTION(ENABLE_GCOV "Enable gcov (debug, Linux builds only)" OFF)
 IF (ENABLE_GCOV AND NOT WIN32 AND NOT APPLE)