Fix '#' commant to be proper C comment.

Author: bmomjian

src/interfaces/python/pgmodule.c

@@ -35,7 +35,7 @@
 #include <stdlib.h>
 #include <string.h>
 
-# PyObject_Del does not exist in older versions of Python.
+/* PyObject_Del does not exist in older versions of Python. */
 #if PY_VERSION_HEX < 0x01060000
 #define PyObject_Del(op) PyMem_Del((op))
 #endif