Correct bug in CLI log "enable all" command.

git-svn-id: https://arducopter.googlecode.com/svn/trunk@2733 f9c3cf11-9bcb-44bc-f272-b75c42450872

ArduCopterMega/Log.pde

@@ -165,6 +165,7 @@ select_logs(uint8_t argc, const Menu::arg *argv)
 	//
 	if (!strcasecmp_P(argv[1].str, PSTR("all"))) {
 		bits = ~(bits = 0);
+		bits = bits ^ MASK_LOG_SET_DEFAULTS;
 	} else {
 		#define TARG(_s)	if (!strcasecmp_P(argv[1].str, PSTR(#_s))) bits |= MASK_LOG_ ## _s
 		TARG(ATTITUDE_FAST);