GDBusActionGroup: don't leak param_str
GDBusActionGroup: don't leak param_str

Signed-off-by: Simon McVittie <2b470b34502dbf3ba4bcc04ea7e64f4e0e104f33@collabora.co.uk>
Bug: https://bugzilla.gnome.org/show_bug.cgi?id=666113
Reviewed-by: Matthias Clasen <097d21dc5518307d71567a83214156cf1ca80f59@redhat.com>

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