g_str_hash() problem

[Brandon Corey <brandon blackboxcentral com>]

I'm having a problem while running a program named pan.  It uses the entire 
gtk kit, and crashes while trying to read a null pointer in g_str_hash().

I'm running glib 2.0.6, atk 1.0.3, pango 1.0.4, and gtk 2.0.6.  Here is the 
output from purify:

****  Purify instrumented ./pan.pure (pid 17201)  ****
ZPR: Zero page read:
  * This is occurring while in thread 65536:
	g_str_hash     [gstring.c:75]
	g_hash_table_lookup [ghash.c:192]
	pango_x_list_subfonts [pangox.c:1116]
	find_char      [basic-x.c:254]
	basic_engine_get_coverage [basic-x.c:694]
	pango_x_face_get_coverage [pangox-fontmap.c:1535]
	pango_x_font_get_coverage [pangox.c:1371]
	pango_font_get_coverage [fonts.c:1043]
	pango_fontset_simple_get_font [pango-fontset.c:364]
	pango_fontset_get_font [pango-fontset.c:86]
  * Reading 1 byte from 0x1

The actual call that causes the crash is:
g_str_hash (gconstpointer key)
{
	const char *p = key;
	guint h = *p;

Where the above *p (key) is a NULL pointer.
So it tries to read the value at the location of NULL pointer p.

I looked at all of the functions mentioned, and it uses a lot of function 
pointers which purify can't handle..  If anyone could give me an idea of 
what's going on here, I'd definitely appreciate it.  g_str_hash() obviously 
doesn't expect the key to be a null pointer (since it doesn't check for it)..

Brandon