Define fminf for platforms that lack it
Define fminf for platforms that lack it

Alwnikrotikz/py-lepton,Alwnikrotikz/py-lepton,AlanZatarain/py-lepton,tectronics/py-lepton,jmichelsen/py-lepton,AlanZatarain/py-lepton,jmichelsen/py-lepton,tectronics/py-lepton