mtp: Address clang compilation errors

* Move default value of debug_enabled to declaration
* Set more-correct fake values for MtpProperty sets

Change-Id: Ife3c15ac6c908848c16a609e8e505336e53c19d8
diff --git a/mtp/twrpMtp.hpp b/mtp/twrpMtp.hpp
index ec7cd4b..9ad270c 100755
--- a/mtp/twrpMtp.hpp
+++ b/mtp/twrpMtp.hpp
@@ -33,7 +33,7 @@
 
 class twrpMtp {
 	public:
-		twrpMtp(int debug_enabled /* = 0 */);
+		twrpMtp(int debug_enabled = 0);
 		pthread_t threadserver(void);
 		pid_t forkserver(int mtppipe[2]);
 		void addStorage(std::string display, std::string path, int mtpid, uint64_t maxFileSize);