Modified all iDistance sensors to return float.

Signed-off-by: Serban Waltter <serban.waltter@rinftech.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>

src/urm37/urm37.cxx

@@ -67,7 +67,7 @@ float URM37::getDistance(int degrees)
   return (distance);
 }
 
-int URM37::getDistance()
+float URM37::getDistance()
 {
     /* TODO: compilation issue for swig. switched original method to not use default zero parameter. */
     return getDistance(0);

src/urm37/urm37.hpp

@@ -129,7 +129,7 @@ namespace upm {
      *
      * @return The measured distance in cm
      */
-    virtual int getDistance();
+    virtual float getDistance();
 
     /**
      * Get the temperature measurement.  This is only valid in UART mode.