Fix "declaration shadows a local variable"
diff --git a/src/commonmark.c b/src/commonmark.c
index 9a029cd..5c08589 100644
--- a/src/commonmark.c
+++ b/src/commonmark.c
@@ -230,7 +230,7 @@
 
   case CMARK_NODE_HEADER:
     if (entering) {
-      for (int i = cmark_node_get_header_level(node); i > 0; i--) {
+      for (i = cmark_node_get_header_level(node); i > 0; i--) {
         LIT("#");
       }
       LIT(" ");