gsignal: Don't crash when operating on signals on the wrong object
gsignal: Don't crash when operating on signals on the wrong object

mzabaluev/glib,cention-sany/glib,johne53/MB3Glib,mzabaluev/glib,cention-sany/glib,MathieuDuponchelle/glib,endlessm/glib,johne53/MB3Glib,tchakabam/glib,mzabaluev/glib,tchakabam/glib,Distrotech/glib,endlessm/glib,mzabaluev/glib,tchakabam/glib,MathieuDuponchelle/glib,MathieuDuponchelle/glib,MathieuDuponchelle/glib,johne53/MB3Glib,Distrotech/glib,tchakabam/glib,Distrotech/glib,endlessm/glib,Distrotech/glib,ieei/glib,Distrotech/glib,cention-sany/glib,cention-sany/glib,ieei/glib,tchakabam/glib,ieei/glib,cention-sany/glib,endlessm/glib,johne53/MB3Glib,ieei/glib,endlessm/glib,ieei/glib,johne53/MB3Glib,mzabaluev/glib,johne53/MB3Glib,MathieuDuponchelle/glib