mtdev: fix a crash when a finger is already on the touchscreen at the application start
mtdev: fix a crash when a finger is already on the touchscreen at the application start

Closes #2829

bob-the-hamster/kivy,kivy/kivy,ernstp/kivy,yoelk/kivy,yoelk/kivy,yoelk/kivy,gonzafirewall/kivy,viralpandey/kivy,gonzafirewall/kivy,manthansharma/kivy,bob-the-hamster/kivy,jffernandez/kivy,jegger/kivy,youprofit/kivy,jehutting/kivy,andnovar/kivy,rnixx/kivy,darkopevec/kivy,autosportlabs/kivy,ernstp/kivy,KeyWeeUsr/kivy,Ramalus/kivy,tony/kivy,Farkal/kivy,ernstp/kivy,matham/kivy,gonzafirewall/kivy,angryrancor/kivy,jkankiewicz/kivy,vipulroxx/kivy,bionoid/kivy,bhargav2408/kivy,jegger/kivy,yoelk/kivy,viralpandey/kivy,jehutting/kivy,cbenhagen/kivy,matham/kivy,manashmndl/kivy,MiyamotoAkira/kivy,dirkjot/kivy,angryrancor/kivy,andnovar/kivy,vitorio/kivy,thezawad/kivy,youprofit/kivy,Cheaterman/kivy,Farkal/kivy,vipulroxx/kivy,JohnHowland/kivy,youprofit/kivy,iamutkarshtiwari/kivy,autosportlabs/kivy,rafalo1333/kivy,Ramalus/kivy,bliz937/kivy,adamkh/kivy,habibmasuro/kivy,akshayaurora/kivy,rafalo1333/kivy,viralpandey/kivy,bliz937/kivy,xpndlabs/kivy,iamutkarshtiwari/kivy,adamkh/kivy,bob-the-hamster/kivy,aron-bordin/kivy,vipulroxx/kivy,habibmasuro/kivy,Cheaterman/kivy,denys-duchier/kivy,matham/kivy,jffernandez/kivy,el-ethan/kivy,KeyWeeUsr/kivy,el-ethan/kivy,kived/kivy,bionoid/kivy,bliz937/kivy,VinGarcia/kivy,JohnHowland/kivy,ernstp/kivy,edubrunaldi/kivy,thezawad/kivy,LogicalDash/kivy,rnixx/kivy,KeyWeeUsr/kivy,dirkjot/kivy,angryrancor/kivy,mSenyor/kivy,xpndlabs/kivy,VinGarcia/kivy,cbenhagen/kivy,inclement/kivy,arcticshores/kivy,MiyamotoAkira/kivy,bionoid/kivy,jkankiewicz/kivy,vipulroxx/kivy,mSenyor/kivy,aron-bordin/kivy,xpndlabs/kivy,Shyam10/kivy,rnixx/kivy,cbenhagen/kivy,janssen/kivy,Shyam10/kivy,MiyamotoAkira/kivy,CuriousLearner/kivy,KeyWeeUsr/kivy,jegger/kivy,gonzafirewall/kivy,janssen/kivy,arlowhite/kivy,LogicalDash/kivy,bhargav2408/kivy,JohnHowland/kivy,janssen/kivy,aron-bordin/kivy,arcticshores/kivy,Ramalus/kivy,akshayaurora/kivy,LogicalDash/kivy,iamutkarshtiwari/kivy,vitorio/kivy,arlowhite/kivy,CuriousLearner/kivy,manashmndl/kivy,habibmasuro/kivy,tony/kivy,Cheaterman/kivy,jehutting/kivy,denys-duchier/kivy,darkopevec/kivy,arlowhite/kivy,JohnHowland/kivy,darkopevec/kivy,xiaoyanit/kivy,bob-the-hamster/kivy,edubrunaldi/kivy,Shyam10/kivy,xiaoyanit/kivy,LogicalDash/kivy,manthansharma/kivy,inclement/kivy,jffernandez/kivy,edubrunaldi/kivy,vitorio/kivy,rafalo1333/kivy,kivy/kivy,kived/kivy,denys-duchier/kivy,bhargav2408/kivy,bionoid/kivy,denys-duchier/kivy,manthansharma/kivy,Farkal/kivy,matham/kivy,mSenyor/kivy,inclement/kivy,adamkh/kivy,Shyam10/kivy,jkankiewicz/kivy,aron-bordin/kivy,jffernandez/kivy,arcticshores/kivy,jkankiewicz/kivy,adamkh/kivy,autosportlabs/kivy,Farkal/kivy,tony/kivy,kivy/kivy,dirkjot/kivy,darkopevec/kivy,dirkjot/kivy,VinGarcia/kivy,el-ethan/kivy,andnovar/kivy,MiyamotoAkira/kivy,thezawad/kivy,janssen/kivy,akshayaurora/kivy,kived/kivy,xiaoyanit/kivy,manashmndl/kivy,arcticshores/kivy,Cheaterman/kivy,manthansharma/kivy,CuriousLearner/kivy,angryrancor/kivy,jegger/kivy