Removed some C++ style comments from the public headers.

Fixes Bugzilla #474.

--HG--
branch : SDL-1.2
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/branches/SDL-1.2%402577

include/begin_code.h

@@ -90,8 +90,8 @@
 #elif !defined(__WINS__)
 #undef DECLSPEC
 #define DECLSPEC __declspec(dllexport)
-#endif //EKA2
-#endif //__SYMBIAN32__
+#endif /* !EKA2 */
+#endif /* __SYMBIAN32__ */
 
 /* Force structure packing at 4 byte alignment.
    This is necessary if the header is included in code which has structure