Added new include file.

src/include/utils/dynahash.h

+/*-------------------------------------------------------------------------
+ *
+ * dynahash--
+ *    POSTGRES dynahash.h file definitions
+ *
+ *
+ * Copyright (c) 1994, Regents of the University of California
+ *
+ * $Id: dynahash.h,v 1.1 1996/11/09 05:48:28 momjian Exp $
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef	DYNAHASH_H
+#define DYNAHASH_H
+
+extern int my_log2(long num);
+
+#endif DYNAHASH_H /* DYNAHASH_H */
+