chg: converting malloc calls -> calloc which zeros out the allocated memory

client/cmdhfmfu.c

@@ -2002,7 +2002,11 @@ int CmdHF14AMfURestore(const char *Cmd){
 		return 1;
 	}
 
-	uint8_t *dump = malloc(fsize);
+	uint8_t *dump = calloc(fsize, sizeof(uint8_t));
+	if ( !dump ) {
+		PrintAndLogEx(WARNING, "Failed to allocate memory");
+		return 1;
+	}
 
 	// read all data
 	size_t bytes_read = fread(dump, 1, fsize, f);