demux:adaptive: fix some paramaters type

They are vlc_tick_t divided by vlc_tick_t so a ratio in float (and processed as such).

modules/demux/adaptive/logic/NearOptimalAdaptationLogic.cpp

@@ -65,7 +65,7 @@ NearOptimalAdaptationLogic::~NearOptimalAdaptationLogic()
 
 BaseRepresentation *
 NearOptimalAdaptationLogic::getNextQualityIndex( BaseAdaptationSet *adaptSet, RepresentationSelector &selector,
-                                                 float gammaP, vlc_tick_t VD, vlc_tick_t Q )
+                                                 float gammaP, float VD, float Q )
 {
     BaseRepresentation *ret = NULL;
     BaseRepresentation *prev = NULL;

modules/demux/adaptive/logic/NearOptimalAdaptationLogic.hpp

@@ -56,8 +56,8 @@ namespace adaptive
 
             private:
                 BaseRepresentation *        getNextQualityIndex( BaseAdaptationSet *, RepresentationSelector &,
-                                                                 float gammaP, vlc_tick_t VD,
-                                                                 vlc_tick_t Q /*current buffer level*/);
+                                                                 float gammaP, float VD,
+                                                                 float Q /*current buffer level*/);
                 float                       getUtility(const BaseRepresentation *);
                 unsigned                    getAvailableBw(unsigned, const BaseRepresentation *) const;
                 unsigned                    getMaxCurrentBw() const;