pcscd: always exit if HPRegisterForHotplugEvents() fails

This is a correction of 2cf20c9 from
2012.

Author: LudovicRousseau

src/pcscdaemon.c

@@ -756,12 +756,11 @@ int main(int argc, char **argv)
 	 * Set up the search for USB/PCMCIA devices
 	 */
 	rv = HPSearchHotPluggables(hpDirPath);
-#ifndef USE_SERIAL
 	if (rv)
+	{
+		Log0(PCSC_LOG_CRITICAL);
 		at_exit();
-#else
-	(void)rv;
-#endif
+	}
 
 	rv = HPRegisterForHotplugEvents(hpDirPath);
 	if (rv)