Strip trailing newline when reading the VERSION file

CMakeLists.txt

@@ -2962,6 +2962,7 @@ set(EXTRA_CFLAGS ${_EXTRA_CFLAGS})
 
 if(EXISTS "${PROJECT_SOURCE_DIR}/VERSION")
   file(READ "${PROJECT_SOURCE_DIR}/VERSION" SDL_SOURCE_VERSION)
+  string(STRIP "${SDL_SOURCE_VERSION}" SDL_SOURCE_VERSION)
 endif()
 
 find_package(Git)