collectdctl: prefix may be undefined as well

This won't happen in practice since ./configure sets it, but it isn't
set when running the code through lint.

diff --git a/src/collectdctl.c b/src/collectdctl.c
index 5978b5e..8c88479 100644 (file)
--- a/src/collectdctl.c
+++ b/src/collectdctl.c
@@ -67,6 +67,10 @@
 
 #include "libcollectdclient/collectd/client.h"
 
+#ifndef PREFIX
+# define PREFIX "/opt/" PACKAGE_NAME
+#endif
+
 #ifndef LOCALSTATEDIR
 # define LOCALSTATEDIR PREFIX "/var"
 #endif