Removed a few calls to polar2lonlatalt by polar2lonlatalt_n (because I think this is the best routine...)
Removed a few calls to polar2lonlatalt by polar2lonlatalt_n
(because I think this is the best routine...)

--HG--
branch : feature/georef

wradlib/wradlib,wradlib/wradlib,kmuehlbauer/wradlib,kmuehlbauer/wradlib,heistermann/wradlib,heistermann/wradlib