script: Copy the JSON node in PropertyInfo
script: Copy the JSON node in PropertyInfo

PropertyInfo should store a copy of the JsonNodes it references, so
that property_info_free() can safely dispose them, and we can reference
values across different UI definition data.

The implicit timeline parsing code is not copying the JsonNode; this
leads to a double free in some cases, which is masked by the GSlice
allocator and produces a heap corruption later on.

kerrickstaley/clutter-vala,spatulasnout/clutter,djdeath/clutter-android,rkudiyarov/clutter_osx,rkudiyarov/clutter_osx,jigpu/clutter,rkudiyarov/clutter_osx,collects/clutter,djdeath/clutter-android,djdeath/clutter,Distrotech/clutter,nobled/clutter,jigpu/clutter,Distrotech/clutter,ebassi/clutter,nobled/clutter,GNOME/clutter,collects/clutter,djdeath/clutter,spatulasnout/clutter,collects/clutter,GNOME/clutter,heysion/clutter-clone,djdeath/clutter,GNOME/clutter,GNOME/clutter,collects/clutter,dlespiau/clutter,ebassi/clutter,Distrotech/clutter,GNOME/clutter,jigpu/clutter,djdeath/clutter-multithreaded,Distrotech/clutter,djdeath/clutter,ebassi/clutter,collects/clutter,djdeath/clutter-multithreaded,djdeath/clutter,jigpu/clutter,nobled/clutter,rkudiyarov/clutter_osx,heysion/clutter-clone,kerrickstaley/clutter-vala,spatulasnout/clutter,jigpu/clutter,djdeath/clutter-multithreaded,heysion/clutter-clone,heysion/clutter-clone,kerrickstaley/clutter-vala,spatulasnout/clutter,jigpu/clutter,djdeath/clutter,Distrotech/clutter,kerrickstaley/clutter-vala,heysion/clutter-clone,djdeath/clutter-android,Distrotech/clutter,ebassi/clutter,djdeath/clutter-android,dlespiau/clutter,djdeath/clutter-multithreaded,dlespiau/clutter,djdeath/clutter-android,spatulasnout/clutter,ebassi/clutter