This patch fixes the errors that occur if the HOME environment vairable
exists, but is an empty string.

Patch by Eduard Bloch <blade@debian.org>.

diff -Naur aumix-2.8.orig/src/common.c aumix-2.8/src/common.c
--- aumix-2.8.orig/src/common.c	2002-10-29 22:27:51.000000000 +0100
+++ aumix-2.8/src/common.c	2002-11-29 19:01:09.000000000 +0100
@@ -591,7 +591,7 @@
 	char            filename[PATH_MAX];
 	if (save_filename == NULL) {
 		home = getenv("HOME");
-		if ((strlen(home) + strlen(AUMIXRC) + 2) < PATH_MAX) {
+		if (home && ((strlen(home) + strlen(AUMIXRC) + 2) < PATH_MAX)) {
 			sprintf(filename, "%s/.%s", home, AUMIXRC);
 			setfile = CheckAndOpen(filename, mode);
 		}