QwtScaleDiv: fixed ticks init when passing all args

Author: PierreRaybaut

qwt/scale_div.py

@@ -104,6 +104,7 @@ def __init__(self, *args):
                 mediumTicks,
                 majorTicks,
             ) = args
+            self.__ticks = [0] * self.NTickTypes
             self.__ticks[self.MinorTick] = minorTicks
             self.__ticks[self.MediumTick] = mediumTicks
             self.__ticks[self.MajorTick] = majorTicks