Avoid a segfault if license is NULL
Avoid a segfault if license is NULL

The license field was introduced later on, so some out-of-tree loaders
may not set it. And Solaris printf() doesn't take NULL for a string...
Bug 594178.

Lyude/gtk-,simokivimaki/gtk,Lyude/gtk-,ebassi/gtk,Lyude/gtk-,jessevdk/gtk,jadahl/gtk,davidgumberg/gtk,Adamovskiy/gtk,chipx86/gtk,chergert/gtk,Unity-Technologies/gtk,grubersjoe/adwaita,ebassi/gtk,ebassi/gtk,nacho/gtk-,chergert/gtk,Unity-Technologies/gtk,Sidnioulz/SandboxGtk,bratsche/gtk-,grubersjoe/adwaita,msteinert/gtk,simokivimaki/gtk,davidt/gtk,davidgumberg/gtk,ahodesuka/gtk,davidt/gtk,Adamovskiy/gtk,Adamovskiy/gtk,jadahl/gtk,davidgumberg/gtk,ahodesuka/gtk,bratsche/gtk-,chergert/gtk,ahodesuka/gtk,davidt/gtk,Unity-Technologies/gtk,msteinert/gtk,chipx86/gtk,davidgumberg/gtk,simokivimaki/gtk,chergert/gtk,johne53/MB3Gtk-2,grubersjoe/adwaita,msteinert/gtk,jadahl/gtk,Distrotech/gtk2,Adamovskiy/gtk,johne53/MB3Gtk-2,grubersjoe/adwaita,jadahl/gtk,ahodesuka/gtk,johne53/MB3Gtk-2,jigpu/gtk,jessevdk/gtk,Lyude/gtk-,simokivimaki/gtk,ahodesuka/gtk,grubersjoe/adwaita,nacho/gtk-,Lyude/gtk-,davidgumberg/gtk,bratsche/gtk-,jigpu/gtk,nacho/gtk-,jigpu/gtk,alexlarsson/gtk,alexlarsson/gtk,nacho/gtk-,Sidnioulz/SandboxGtk,alexlarsson/gtk,jessevdk/gtk,Distrotech/gtk2,Distrotech/gtk,jessevdk/gtk,davidgumberg/gtk,grubersjoe/adwaita,chipx86/gtk,Sidnioulz/SandboxGtk,jigpu/gtk,grubersjoe/adwaita,ahodesuka/gtk,bratsche/gtk-,grubersjoe/adwaita,alexlarsson/gtk,jigpu/gtk,jigpu/gtk,jigpu/gtk,Lyude/gtk-,Distrotech/gtk2,davidgumberg/gtk,Distrotech/gtk,simokivimaki/gtk,Distrotech/gtk,Distrotech/gtk,davidt/gtk,davidt/gtk,ebassi/gtk,nacho/gtk-,jadahl/gtk,Adamovskiy/gtk,Distrotech/gtk2,johne53/MB3Gtk-2,jessevdk/gtk,chergert/gtk,Unity-Technologies/gtk,Adamovskiy/gtk,alexlarsson/gtk,ebassi/gtk,alexlarsson/gtk,chergert/gtk,alexlarsson/gtk,Distrotech/gtk,Adamovskiy/gtk,bratsche/gtk-,chergert/gtk,jadahl/gtk,Sidnioulz/SandboxGtk,Lyude/gtk-,chergert/gtk,davidgumberg/gtk,Lyude/gtk-,alexlarsson/gtk,ebassi/gtk,Unity-Technologies/gtk,ahodesuka/gtk,Adamovskiy/gtk,msteinert/gtk,davidt/gtk,msteinert/gtk,ahodesuka/gtk,bratsche/gtk-,jadahl/gtk,msteinert/gtk,jigpu/gtk,chipx86/gtk,jessevdk/gtk,simokivimaki/gtk,Sidnioulz/SandboxGtk,chipx86/gtk,johne53/MB3Gtk-2,Distrotech/gtk2,Sidnioulz/SandboxGtk,jessevdk/gtk,Distrotech/gtk2,jadahl/gtk