depmod: fix handling of .gz modules

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/modutils/modutils.c b/modutils/modutils.c
index 0f6cb0f..f437a98 100644
--- a/modutils/modutils.c
+++ b/modutils/modutils.c
@@ -57,7 +57,7 @@
 	from = bb_get_last_path_component_nostrip(filename);
 	for (i = 0; i < (MODULE_NAME_LEN-1) && from[i] != '\0' && from[i] != '.'; i++)
 		modname[i] = (from[i] == '-') ? '_' : from[i];
-	modname[i] = 0;
+	modname[i] = '\0';
 
 	return modname;
 }