On the off-chance that anyone actually reads this and is interested in
I've traced it down to a problem with building on a 32bit machine, in
this case a Raspberry Pi.
The problem seems to be in glade_gtk_cell_renderer_read_attributes in
I've found that passing the g_int64 from g_ascii_strtoll into
glade_property_set causes the problem as glade_property_set_va_list
converts a gint into the value not a gint64.
On 64bit architectures gint and gint64 are the same so there is no
problem. However on 32bit architectures it gets the wrong result !
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