class_properties.hpp: Make the empty character constant into a single space (which isn't used), because the Sun compiler is very eager to spit out an error here.

[SVN r22865]

libs/test

@@ -1 +1 @@
-Subproject commit 8fb26513b86e20610894dc181687e4f6f7c46f30
+Subproject commit 9cc4a9c8dae630068789043fcd0f246dfef4edf3