Fix descriptor/memory leak in compress(1) code

This is mostly a style fix since the code in question is not called multiple
times and doesn't have cummulative effect.

PR:		204953
Submitted by:	David Binderman <dcb314@hotmail.com>
MFC after:	1 week

usr.bin/compress/compress.c

@@ -322,6 +322,8 @@ decompress(const char *in, const char *out, int bits)
 	if ((ofp = fopen(out, "w")) == NULL ||
 	    (nr != 0 && fwrite(buf, 1, nr, ofp) != nr)) {
 		cwarn("%s", out);
+		if (ofp)
+			(void)fclose(ofp);
 		(void)fclose(ifp);
 		return;
 	}