Fix a few doxygen warnings

pcbnew/tools/drawing_tool.h

@@ -197,6 +197,9 @@ private:
     ///> @param aShape is the type of created shape (@see STROKE_T).
     ///> @param aGraphic is an object that is going to be used by the tool for drawing. It has to
     ///> be already created. The tool deletes the object if it is not added to a BOARD.
+    ///> @param aStartingPoint is a starting point for this new DRAWSEGMENT. If exists
+    ///> the new item has its start point set to aStartingPoint,
+    ///> and its settings (width, layer) set to the current default values.
     ///> @return False if the tool was cancelled before the origin was set or origin and end are
     ///> the same point.
     bool drawSegment( int aShape, DRAWSEGMENT*& aGraphic,

pcbnew/tools/pcb_editor_control.cpp

@@ -1002,6 +1002,7 @@ int PCB_EDITOR_CONTROL::DrillOrigin( const TOOL_EVENT& aEvent )
  * Function highlightNet()
  * Looks for a BOARD_CONNECTED_ITEM in a given spot, and if one is found - it enables
  * highlight for its net.
+ * @param aToolMgr is the TOOL_MANAGER currently in use.
  * @param aPosition is the point where an item is expected (world coordinates).
  */
 static bool highlightNet( TOOL_MANAGER* aToolMgr, const VECTOR2D& aPosition )

pcbnew/tools/size_menu.h

@@ -33,7 +33,7 @@ public:
     /**
      * Constructor.
      * @param aTrackSizes decides if the context menu should contain track sizes.
-     * @param aTrackSizes decides if the context menu should contain via sizes.
+     * @param aViaSizes decides if the context menu should contain via sizes.
      */
     TRACK_VIA_SIZE_MENU( bool aTrackSizes, bool aViaSizes );