Bug#1020532: gimp: text element crashes gimp

[Bernhard Übelacker]

> /lib/x86_64-linux-gnu/libc.so.6(+0x3daf0)[0x7f73b843daf0]
> /lib/x86_64-linux-gnu/libgobject-2.0.so.0(+0x25103)[0x7f73b8995103]
> /lib/x86_64-linux-gnu/libgobject-2.0.so.0(+0x1b6d8)[0x7f73b898b6d8]
> /lib/x86_64-linux-gnu/libgobject-2.0.so.0(+0x1bf5a)[0x7f73b898bf5a]
> /lib/x86_64-linux-gnu/libgobject-2.0.so.0(g_object_new_with_properties+0x194)[0x7f73b898d3f4]
> gimp-2.10(gimp_image_undo_push+0x1a7)[0x55d92d43c787]
> gimp-2.10(gimp_image_undo_push_text_layer+0x104)[0x55d92d43f344]
> gimp-2.10(gimp_text_tool_apply+0x103)[0x55d92d16ee93]


Frames below signal handler are looking similar to #1018105.