* generic/gdbtk-cmds.c (gdb_load_disassembly): Save the original

	* generic/gdbtk-cmds.c (gdb_load_disassembly): Save the original
	address from parse_and_eval_address: if find_pc_partial_function
	errors, we will lose our original address.
	If find_pc_partial_function does error, print out both
	the address we thought we were disassembling at AND the address
	we actually did disassemble at. This should help elide address-
	to-pointer and pointer-to-address problems in the tdep files.
	* library/srctextwin.itb (FillAssembly): When gdb_load_disassembly
	fails, use its error message instead of the cooked "Unable to
	Read insturctions..." message.
	(UnLoadFromCache): If oldpane is empty, don't try show it,
	don't try to set our view to it, don't do anything but
	erase the given pane.