iconv/tst-iconv5: fix ic variable type

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

test/iconv/tst-iconv5.c

@@ -59,7 +59,7 @@ static int
 convert (const char *tocode, const char *fromcode, char *inbufp,
 	 size_t inbytesleft, char *outbufp, size_t outbytesleft)
 {
-  iconv_t *ic;
+  iconv_t ic;
   size_t outbytes = outbytesleft;
   int ret;