BUG: Fix GIL handling in _sosfilt
BUG: Fix GIL handling in _sosfilt

mdhaber/scipy,ilayn/scipy,vigna/scipy,e-q/scipy,endolith/scipy,perimosocordiae/scipy,tylerjereddy/scipy,rgommers/scipy,mdhaber/scipy,perimosocordiae/scipy,anntzer/scipy,vigna/scipy,endolith/scipy,Eric89GXL/scipy,vigna/scipy,Stefan-Endres/scipy,Stefan-Endres/scipy,zerothi/scipy,WarrenWeckesser/scipy,zerothi/scipy,tylerjereddy/scipy,e-q/scipy,zerothi/scipy,Eric89GXL/scipy,scipy/scipy,andyfaff/scipy,Eric89GXL/scipy,ilayn/scipy,rgommers/scipy,scipy/scipy,perimosocordiae/scipy,anntzer/scipy,grlee77/scipy,scipy/scipy,anntzer/scipy,anntzer/scipy,tylerjereddy/scipy,WarrenWeckesser/scipy,endolith/scipy,tylerjereddy/scipy,matthew-brett/scipy,anntzer/scipy,andyfaff/scipy,andyfaff/scipy,WarrenWeckesser/scipy,Eric89GXL/scipy,andyfaff/scipy,Eric89GXL/scipy,matthew-brett/scipy,vigna/scipy,endolith/scipy,WarrenWeckesser/scipy,rgommers/scipy,mdhaber/scipy,andyfaff/scipy,WarrenWeckesser/scipy,endolith/scipy,andyfaff/scipy,grlee77/scipy,Stefan-Endres/scipy,scipy/scipy,tylerjereddy/scipy,grlee77/scipy,WarrenWeckesser/scipy,endolith/scipy,ilayn/scipy,matthew-brett/scipy,ilayn/scipy,e-q/scipy,grlee77/scipy,mdhaber/scipy,Eric89GXL/scipy,rgommers/scipy,zerothi/scipy,perimosocordiae/scipy,scipy/scipy,Stefan-Endres/scipy,perimosocordiae/scipy,Stefan-Endres/scipy,zerothi/scipy,scipy/scipy,mdhaber/scipy,ilayn/scipy,Stefan-Endres/scipy,mdhaber/scipy,zerothi/scipy,matthew-brett/scipy,grlee77/scipy,ilayn/scipy,matthew-brett/scipy,anntzer/scipy,rgommers/scipy,perimosocordiae/scipy,e-q/scipy,e-q/scipy,vigna/scipy