Revert "g_menu_markup_start_element: tolerate not having a hash table of objects"
Revert "g_menu_markup_start_element: tolerate not having a hash table of objects"

This reverts commit bcdb60641196f98482b5e17fcc96a92589deba35,
accidentally pushed before it was reviewed.

Distrotech/glib,darren-clark/android_platform_external_bluetooth_glib,tchakabam/glib,cosimoc/glib,ieei/glib,Distrotech/glib,pstglia/platform-external-bluetooth-glib,pstglia/external-bluetooth-glib,Distrotech/glib,antono/glib,iConsole/Console-OS_external_bluetooth_glib,mzabaluev/glib,endlessm/glib,johne53/MB3Glib,gale320/glib,lukasz-skalski/glib,gale320/glib,krichter722/glib,cention-sany/glib,gale320/glib,cention-sany/glib,tchakabam/glib,bluez-android/glib,pstglia/platform-external-bluetooth-glib,iConsole/Console-OS_external_bluetooth_glib,01org/android-bluez-glib,lukasz-skalski/glib,tamaskenez/glib,bluez-android/glib,darren-clark/android_platform_external_bluetooth_glib,tchakabam/glib,cosimoc/glib,gale320/glib,johne53/MB3Glib,iConsole/Console-OS_external_bluetooth_glib,bluez-android/glib,endlessm/glib,tamaskenez/glib,antono/glib,johne53/MB3Glib,mzabaluev/glib,01org/android-bluez-glib,cention-sany/glib,lukasz-skalski/glib,iConsole/Console-OS_external_bluetooth_glib,pstglia/platform-external-bluetooth-glib,bluez-android/glib,djdeath/glib,tchakabam/glib,bluez-android/glib,djdeath/glib,pstglia/external-bluetooth-glib,djdeath/glib,mzabaluev/glib,krichter722/glib,01org/android-bluez-glib,Distrotech/glib,ieei/glib,justinkb/aosp-bluez.glib,01org/android-bluez-glib,MathieuDuponchelle/glib,ieei/glib,endlessm/glib,antono/glib,krichter722/glib,mzabaluev/glib,krichter722/glib,MathieuDuponchelle/glib,lukasz-skalski/glib,pstglia/platform-external-bluetooth-glib,mzabaluev/glib,cention-sany/glib,cosimoc/glib,01org/android-bluez-glib,pstglia/external-bluetooth-glib,gale320/glib,tamaskenez/glib,justinkb/aosp-bluez.glib,endlessm/glib,justinkb/aosp-bluez.glib,ieei/glib,darren-clark/android_platform_external_bluetooth_glib,cosimoc/glib,pstglia/external-bluetooth-glib,endlessm/glib,cosimoc/glib,lukasz-skalski/glib,MathieuDuponchelle/glib,tamaskenez/glib,pstglia/external-bluetooth-glib,cention-sany/glib,MathieuDuponchelle/glib,iConsole/Console-OS_external_bluetooth_glib,justinkb/aosp-bluez.glib,pstglia/platform-external-bluetooth-glib,MathieuDuponchelle/glib,antono/glib,darren-clark/android_platform_external_bluetooth_glib,johne53/MB3Glib,darren-clark/android_platform_external_bluetooth_glib,krichter722/glib,johne53/MB3Glib,johne53/MB3Glib,tamaskenez/glib,djdeath/glib,ieei/glib,Distrotech/glib,tchakabam/glib,djdeath/glib,justinkb/aosp-bluez.glib