Partially revert "Remove dead code"

This partially reverts commit bd4f96e.

Author: kevinbackhouse

src/commonmark.c

@@ -155,6 +155,7 @@ static bool is_autolink(cmark_node *node) {
 
 static int S_render_node(cmark_renderer *renderer, cmark_node *node,
                          cmark_event_type ev_type, int options) {
+  cmark_node *tmp;
   int list_number;
   cmark_delim_type list_delim;
   int numticks;

src/man.c

@@ -74,6 +74,7 @@ static void S_outc(cmark_renderer *renderer, cmark_node *node,
 
 static int S_render_node(cmark_renderer *renderer, cmark_node *node,
                          cmark_event_type ev_type, int options) {
+  cmark_node *tmp;
   int list_number;
   bool entering = (ev_type == CMARK_EVENT_ENTER);
   bool allow_wrap = renderer->width > 0 && !(CMARK_OPT_NOBREAKS & options);

src/plaintext.c

@@ -18,6 +18,7 @@ static CMARK_INLINE void outc(cmark_renderer *renderer, cmark_node *node,
 
 static int S_render_node(cmark_renderer *renderer, cmark_node *node,
                          cmark_event_type ev_type, int options) {
+  cmark_node *tmp;
   int list_number;
   cmark_delim_type list_delim;
   int i;