systemd-python: fix gcc warning

src/python-systemd/_reader.c: In function Reader_get_catalog:
src/python-systemd/_reader.c:912:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             assert(mid_len > l);
                            ^

diff --git a/src/python-systemd/_reader.c b/src/python-systemd/_reader.c
index 98a99aa0ab0c6f0b836e8902c19cc874bf5a5116..a678f69318055c94b14179aa3f13a7771d5b1a21 100644 (file)
--- a/src/python-systemd/_reader.c
+++ b/src/python-systemd/_reader.c
@@ -908,9 +908,9 @@ static PyObject* Reader_get_catalog(Reader *self, PyObject *args)
 
         r = sd_journal_get_data(self->j, "MESSAGE_ID", &mid, &mid_len);
         if (r == 0) {
-            const int l = sizeof("MESSAGE_ID");
+            const size_t l = sizeof("MESSAGE_ID");
             assert(mid_len > l);
-            PyErr_Format(PyExc_KeyError, "%.*s", (int) mid_len - l,
+            PyErr_Format(PyExc_KeyError, "%.*s", (int) (mid_len - l),
                          (const char*) mid + l);
         } else if (r == -ENOENT)
             PyErr_SetString(PyExc_IndexError, "no MESSAGE_ID field");