TT#108003 Fix double free in __established()

The __attempt_send() function will free the gs string on success,
so we should not free it again.

Change-Id: I74c9e41854db56bf29ae541eaeebfb97ce8eeb74
Warned-by: coverity

daemon/homer.c

@@ -116,7 +116,6 @@ static int __established(struct homer_sender *hs) {
 		if (ret == 1) // write error, takes care of deleting hs->partial
 			return -1;
 		// ret == 0 -> sent OK, drop through to unqueue
-		g_string_free(hs->partial, TRUE);
 		hs->partial = NULL;
 	}