Fix overflow in track len calculations and display (Bug #1347878).

pcbnew/class_board.cpp

@@ -1878,10 +1878,10 @@ TRACK* BOARD::MarkTrace( TRACK*  aTrace, int* aCount,
     }
 
     if( aTraceLength )
-        *aTraceLength = KiROUND( full_len );
+        *aTraceLength = full_len;
 
     if( aPadToDieLength )
-        *aPadToDieLength = KiROUND( lenPadToDie );
+        *aPadToDieLength = lenPadToDie;
 
     if( aCount )
         *aCount = NbSegmBusy;

pcbnew/class_track.cpp

@@ -1002,7 +1002,7 @@ void TRACK::GetMsgPanelInfo( std::vector< MSG_PANEL_ITEM >& aList )
         double trackLen = 0;
         double lenPadToDie = 0;
         board->MarkTrace( this, NULL, &trackLen, &lenPadToDie, false );
-        msg = ::CoordinateToString( trackLen );
+        msg = ::LengthDoubleToString( trackLen );
         aList.push_back( MSG_PANEL_ITEM( _( "Track Len" ), msg, DARKCYAN ) );
 
         if( lenPadToDie != 0 )