DOC: Correct dual annealing visiting param range.
DOC: Correct dual annealing visiting param range.

Dual annealing's visiting parameter cannot be less than 1, lest one
encounters domain errors in constructing VisitingDistribution.

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