Fixed bug in getting earlyBellTime in Gantt.

Changed GeoAnimation to set xMax, yMax to 1 when there are no points in the gpx file to prevent divide by zero.

Gantt.py

@@ -626,7 +626,10 @@ def refresh( self ):
 				earlyBellTimes.extend( c.earlyBellTime if r.status == Finisher else None for r in catResults )
 		else:
 			results = GetResults( category )
-			earlyBellTimes = [(category.earlyBellTime if category else None) if r.status == Finisher else None for r in results]
+			def _getEarlyBellTime( num ):
+				c = race.getCategory( num )
+				return c.earlyBellTime if c else None
+			earlyBellTimes = [_getEarlyBellTime(r.num) if r.status == Finisher else None for r in results]
 
 		if race.showFullNamesInChart:
 			def getLabel( r ):

GeoAnimation.py

@@ -378,8 +378,9 @@ def setPoints( self, gpsPoints, isPointToPoint = False ):
 		self.gpsPoints = gpsPoints
 		self.isPointToPoint = isPointToPoint
 
-		self.xMax = max( (p.x for p in self.gpsPoints), default=0 )
-		self.yMax = max( (p.y for p in self.gpsPoints), default=0 )
+		# Default max to 1 to avoid divisivion by zero errors.
+		self.xMax = max( (p.x for p in self.gpsPoints), default=1 )
+		self.yMax = max( (p.y for p in self.gpsPoints), default=1 )
 
 		dCum = 0.0
 		self.cumDistance = []