Tell user when build type defaults to debug.

Author: bsamseth

cmake/ConfigSafeGuards.cmake

@@ -1,11 +1,11 @@
-
 # guard against in-source builds
 if(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_BINARY_DIR})
     message(FATAL_ERROR "In-source builds not allowed. Please make a new directory (called a build directory) and run CMake from there.")
 endif()
 
 # guard against bad build-type strings
-if(NOT CMAKE_BUILD_TYPE)
+if (NOT CMAKE_BUILD_TYPE)
+    message(STATUS "No build type selected, default to Debug")
     set(CMAKE_BUILD_TYPE "Debug")
 endif()