Updates to a number of apps to remove warnings/compile errors under libc5.
Tested under both libc5 and libc6 and all seems well with these fixes.
 -Erik
diff --git a/gunzip.c b/gunzip.c
index 78ee1d3..f2bb59d 100644
--- a/gunzip.c
+++ b/gunzip.c
@@ -746,7 +746,7 @@
 			exit(FALSE);
 		}
 	}
-	exit(exit_code);
+	return(exit_code);
 }