ADB Backup: Fix gzip backup and restore

Change-Id: I92821c7053089d130a5ab73fa36aec486da77bf1
diff --git a/twrpAdbBuFifo.hpp b/twrpAdbBuFifo.hpp
index e709b96..b34c77b 100644
--- a/twrpAdbBuFifo.hpp
+++ b/twrpAdbBuFifo.hpp
@@ -31,7 +31,7 @@
 	private:
 		bool start(void);
 		bool Backup_ADB_Command(std::string Options);
-		bool Check_Adb_Fifo_For_Events(void);
+		void Check_Adb_Fifo_For_Events(void);
 		bool Restore_ADB_Backup(void);
 		typedef bool (twrpAdbBuFifo::*ThreadPtr)(void);
 		typedef void* (*PThreadPtr)(void *);