(file_init): reset length when done with a part

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@17146 ec53bebd-3082-4978-b11e-865c3cabbd6b

lib/hx509/ks_file.c

@@ -349,6 +349,7 @@ parse_pem_file(hx509_context context,
 	    }
 	    free(data);
 	    data = NULL;
+	    len = 0;
 	    free(type);
 	    type = NULL;
 	    where = BEFORE;