Added ndn_realloc
diff --git a/ndn-cpp/c/util/ndn_realloc.c b/ndn-cpp/c/util/ndn_realloc.c
new file mode 100644
index 0000000..397834b
--- /dev/null
+++ b/ndn-cpp/c/util/ndn_realloc.c
@@ -0,0 +1,12 @@
+/**
+ * @author: Jeff Thompson
+ * See COPYING for copyright and distribution information.
+ */
+
+#include <stdlib.h>
+#include "ndn_realloc.h"
+
+unsigned char *ndn_realloc(unsigned char *array, unsigned int length)
+{
+  return (unsigned char *)realloc(array, length);
+}