Fix compiler warning
Fix compiler warning

pkcs15-pubkey.c:787:5: warning: no previous prototype for function
      'sc_pkcs15_read_der_file' [-Wmissing-prototypes]
int sc_pkcs15_read_der_file(sc_context_t *ctx, char * filename,
    ^


git-svn-id: 444ed946b9c2220da791e84c3dd156a05f92db99@5131 c6295689-39f2-0310-b995-f0e70906c6a9

mtrojnar/OpenSC,kasparsd/opensc-latvia-id,adminmt/OpenSC,LudovicRousseau/OpenSC,carlhoerberg/OpenSC,hhonkanen/OpenSC,tidatida/OpenSC,martinpaljak/OpenSC,0x7678/myOpenSC,fabled/OpenSC,dirkx/OpenSC.tokend,OpenSC/OpenSC,philipWendland/OpenSC,dirkx/OpenSC,ieugen/OpenSC,gentoo/OpenSC,dirkx/OpenSC,frankmorgner/OpenSC,dengert/OpenSC,financeX/OpenSC,marschap/pkg-opensc,dirkx/OpenSC.tokend,carlhoerberg/OpenSC,gemini/OpenSC,viktorTarasov/OpenSC-SM,viktorTarasov/OpenSC-SM,jpki/OpenSC,CardContact/OpenSC,nmav/OpenSC,kasparsd/opensc-latvia-id,dengert/OpenSC,0x7678/myOpenSC,ieugen/OpenSC,philipWendland/OpenSC,financeX/OpenSC,adminmt/OpenSC,mtrojnar/OpenSC,marschap/pkg-opensc,kasparsd/opensc-latvia-id,philipWendland/OpenSC,velter/OpenSC,OpenSC/OpenSC,0x7678/myOpenSC,dirkx/OpenSC,hhonkanen/OpenSC,viktorTarasov/OpenSC-SM,l1k/OpenSC,LudovicRousseau/OpenSC,0x7678/OpenSC,UIKit0/OpenSC,hongquan/OpenSC-main,0x7678/myOpenSC,financeX/OpenSC,fabled/OpenSC,l1k/OpenSC,OpenSC/OpenSC,rickyepoderi/OpenSC,mouse07410/OpenSC,LudovicRousseau/OpenSC,gemini/OpenSC,jpki/OpenSC,gentoo/OpenSC,marschap/pkg-opensc,CardContact/OpenSC,hongquan/OpenSC-main,carlhoerberg/OpenSC,marschap/pkg-opensc,l1k/OpenSC,kasparsd/opensc-latvia-id,dirkx/OpenSC,hongquan/OpenSC-main,metsma/OpenSC,dirkx/OpenSC.tokend,adminmt/OpenSC,nmav/OpenSC,velter/OpenSC,velter/OpenSC,UIKit0/OpenSC,carlhoerberg/OpenSC,adminmt/OpenSC,fabled/OpenSC,metsma/OpenSC,tidatida/OpenSC,dirkx/OpenSC.tokend,AktivCo/OpenSC,gentoo/OpenSC,0x7678/OpenSC,ieugen/OpenSC,gemini/OpenSC,aobaid/OpenSC,jpki/OpenSC,aobaid/OpenSC,ieugen/OpenSC,germanblanco/OpenSC,aobaid/OpenSC,frankmorgner/OpenSC,Jakuje/OpenSC,rickyepoderi/OpenSC,dirkx/OpenSC.tokend,rickyepoderi/OpenSC,financeX/OpenSC,Jakuje/OpenSC,AktivCo/OpenSC,UIKit0/OpenSC,0x7678/OpenSC,mouse07410/OpenSC,frankmorgner/OpenSC,mtrojnar/OpenSC,carlhoerberg/OpenSC,Jakuje/OpenSC,dengert/OpenSC,ieugen/OpenSC,martinpaljak/OpenSC,financeX/OpenSC,gentoo/OpenSC,dirkx/OpenSC.tokend,Jakuje/OpenSC,AktivCo/OpenSC,tidatida/OpenSC,0x7678/OpenSC,tidatida/OpenSC,velter/OpenSC,metsma/OpenSC,UIKit0/OpenSC,0x7678/myOpenSC,aobaid/OpenSC,nmav/OpenSC,gentoo/OpenSC,mouse07410/OpenSC,martinpaljak/OpenSC,frankmorgner/OpenSC,fabled/OpenSC,hhonkanen/OpenSC,CardContact/OpenSC,dirkx/OpenSC,germanblanco/OpenSC,germanblanco/OpenSC