Added ndn_realloc
diff --git a/ndn-cpp/c/util/ndn_realloc.h b/ndn-cpp/c/util/ndn_realloc.h
new file mode 100644
index 0000000..db9470d
--- /dev/null
+++ b/ndn-cpp/c/util/ndn_realloc.h
@@ -0,0 +1,26 @@
+/**
+ * @author: Jeff Thompson
+ * See COPYING for copyright and distribution information.
+ */
+
+#ifndef NDN_NDN_REALLOC_H
+#define NDN_NDN_REALLOC_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Wrap the C stdlib realloc to convert to/from void * to unsigned char *.
+ * This can be used by ndn_DynamicUCharArray_init.
+ * @param array the allocated array buffer to realloc
+ * @param length the length for the new array buffer
+ * @return the new allocated array buffer
+ */
+unsigned char *ndn_realloc(unsigned char *array, unsigned int length);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif