goToDate wrong day bug fixed

Fixes goToDate bug that causes that the calendar sometimes goes to 1
day before the chosen date

Author: KimPark89

library/src/main/java/com/alamkanak/weekview/WeekView.java

@@ -1386,7 +1386,10 @@ public void goToDate(Calendar date) {
         today.set(Calendar.SECOND, 0);
         today.set(Calendar.MILLISECOND, 0);
 
-        int dateDifference = (int) ((date.getTimeInMillis() - today.getTimeInMillis()) / (1000 * 60 * 60 * 24));
+        long dateInMillis = date.getTimeInMillis() + date.getTimeZone().getOffset(date.getTimeInMillis());
+        long todayInMillis = today.getTimeInMillis() + today.getTimeZone().getOffset(today.getTimeInMillis());
+        int dateDifference = (int) ((dateInMillis - todayInMillis) / (1000 * 60 * 60 * 24));
+
         mCurrentOrigin.x = - dateDifference * (mWidthPerDay + mColumnGap);
         // mStickyScroller.startScroll((int) mCurrentOrigin.x, 0, (int) (-dateDifference*(mWidthPerDay + mColumnGap)-mCurrentOrigin.x), 0);
         invalidate();