handle cleanup from the caller

instead of freeing the resource in mkd_xhtmlpage and mkd_dumptree, the mkd_cleanup now has to be explicitly called.

dumptree.c

@@ -145,7 +145,6 @@ mkd_dump(Document *doc, FILE *out, int flags, char *title)
 	dumptree(doc->code, &stack, out);
 	DELETE(stack);
 
-	mkd_cleanup(doc);
 	return 0;
     }
     return -1;

main.c

@@ -206,9 +206,9 @@ main(int argc, char **argv)
 		    mkd_generatetoc(doc, stdout);
 		if ( content )
 		    mkd_generatehtml(doc, stdout);
-		mkd_cleanup(doc);
 	    }
 	}
+	mkd_cleanup(doc);
     }
     mkd_deallocate_tags();
     adump();

makepage.c

@@ -30,6 +30,7 @@ char **argv;
     char *q;
     int version = 0;
     int opt;
+    int ret;
     mkd_flag_t flags = 0;
 
     if ( (q = getenv("MARKDOWN_FLAGS")) )
@@ -82,5 +83,9 @@ char **argv;
 	exit(1);
     }
 
-    exit(mkd_xhtmlpage(doc, flags, stdout));
+    ret = mkd_xhtmlpage(doc, flags, stdout);
+
+    mkd_cleanup(doc);
+
+    exit(ret);
 }

xmlpage.c

@@ -39,8 +39,6 @@ mkd_xhtmlpage(Document *p, int flags, FILE *out)
 	mkd_generatehtml(p, out);
 	fprintf(out, "</body>\n");
 	fprintf(out, "</html>\n");
-	
-	mkd_cleanup(p);
 
 	return 0;
     }