utils_subst.c: add header for prototypes

diff --git a/src/utils_subst.c b/src/utils_subst.c
index a49f6db..ca1e933 100644 (file)
--- a/src/utils_subst.c
+++ b/src/utils_subst.c
@@ -25,6 +25,7 @@
 
 #include "collectd.h"
 #include "common.h"
+#include "utils_subst.h"
 
 char *subst (char *buf, size_t buflen, const char *string, int off1, int off2,
                const char *replacement)