g_file_make_directory_with_parents: refix error propagation
g_file_make_directory_with_parents: refix error propagation

The patch from b0bce4ad triggered segfaults - see:

 http://redmine.yorba.org/issues/5656

We were clearing the error before dereferencing it in the next
go-around of the while loop - this wasn't necessary.

https://bugzilla.gnome.org/show_bug.cgi?id=680823

djdeath/glib,MathieuDuponchelle/glib,cosimoc/glib,djdeath/glib,tamaskenez/glib,lukasz-skalski/glib,Distrotech/glib,krichter722/glib,MathieuDuponchelle/glib,tamaskenez/glib,lukasz-skalski/glib,Distrotech/glib,Distrotech/glib,cosimoc/glib,johne53/MB3Glib,mzabaluev/glib,lukasz-skalski/glib,ieei/glib,krichter722/glib,lukasz-skalski/glib,johne53/MB3Glib,tchakabam/glib,gale320/glib,MathieuDuponchelle/glib,cention-sany/glib,krichter722/glib,endlessm/glib,tamaskenez/glib,cosimoc/glib,djdeath/glib,endlessm/glib,endlessm/glib,ieei/glib,MathieuDuponchelle/glib,lukasz-skalski/glib,tamaskenez/glib,cention-sany/glib,endlessm/glib,mzabaluev/glib,cention-sany/glib,gale320/glib,krichter722/glib,tchakabam/glib,johne53/MB3Glib,johne53/MB3Glib,ieei/glib,tchakabam/glib,cosimoc/glib,djdeath/glib,endlessm/glib,MathieuDuponchelle/glib,Distrotech/glib,mzabaluev/glib,johne53/MB3Glib,mzabaluev/glib,mzabaluev/glib,cention-sany/glib,johne53/MB3Glib,gale320/glib,gale320/glib,Distrotech/glib,tchakabam/glib,cention-sany/glib,djdeath/glib,cosimoc/glib,tchakabam/glib,ieei/glib,krichter722/glib,ieei/glib,tamaskenez/glib,gale320/glib