Fix eina_tile_grid_slicer_setup when a 0x0 rectangle was given as argument.
Fix eina_tile_grid_slicer_setup when a 0x0 rectangle was given as argument.

In this case slc->first wasn't being set, as well as the info.col and
info.row. This could bring some strange behavior like a call to
eina_tile_grid_slicer_next() not returning false.



SVN revision: 42783

gfriloux/eina,turran/eina,gfriloux/eina,turran/eina,turran/eina,gfriloux/eina