logging: Call color only once and use the result
First we check if a color is defined and then we call it again
and use the result. Avoid the second call and use the result of
the previous call.
diff --git a/src/logging.c b/src/logging.c
index 7b53277..36c31c4 100644
--- a/src/logging.c
+++ b/src/logging.c
@@ -245,7 +245,7 @@
if (target->use_color) {
const char *c = color(subsys);
if (c) {
- ret = snprintf(buf + offset, rem, "%s", color(subsys));
+ ret = snprintf(buf + offset, rem, "%s", c);
if (ret < 0)
goto err;
OSMO_SNPRINTF_RET(ret, rem, offset, len);