alpm: Do not raise SIGINT when filesize goes over limit

Variable dload_interrupted is used both to abort a download because
SIGINT was caught, and when a file limit is reached. But raising SIGINT
is only meant to happen in the first case.

Signed-off-by: Olivier Brunel <jjk@jjacky.com>
(cherry picked from commit d96d0ffe7c)

lib/libalpm/dload.c

@@ -585,7 +585,7 @@ cleanup:
 	unmask_signal(SIGINT, &orig_sig_int);
 	unmask_signal(SIGPIPE, &orig_sig_pipe);
 	/* if we were interrupted, trip the old handler */
-	if(dload_interrupted) {
+	if(dload_interrupted == ABORT_SIGINT) {
 		raise(SIGINT);
 	}