parsing.c: enable builds with NO_ICONV defined

Signed-off-by: Lars Hjemli <hjemli@gmail.com>
diff --git a/parsing.c b/parsing.c
index c8f3048..f3f3b15 100644
--- a/parsing.c
+++ b/parsing.c
@@ -96,6 +96,9 @@
 	return p;
 }
 
+#ifdef NO_ICONV
+#define reencode(a, b, c)
+#else
 const char *reencode(char **txt, const char *src_enc, const char *dst_enc)
 {
 	char *tmp;
@@ -110,6 +113,7 @@
 	}
 	return *txt;
 }
+#endif
 
 struct commitinfo *cgit_parse_commit(struct commit *commit)
 {