Fix to revert into the orignal location

Author: noah

_example/location.go

@@ -0,0 +1,13 @@
+package main
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/gitploy-io/cronexpr"
+)
+
+func main() {
+	nextTime := cronexpr.MustParseInLocation("0 * * * *", "Asia/Seoul").Next(time.Now())
+	fmt.Printf("Parse the cron expression in the KR timezone: %s", nextTime)
+}

schedule.go

@@ -18,6 +18,7 @@ func (s *Schedule) Next(t time.Time) time.Time {
 		loc = s.Location
 	}
 
+	origLoc := t.Location()
 	t.In(loc)
 
 	added := false
@@ -92,7 +93,7 @@ L:
 		}
 	}
 
-	return t
+	return t.In(origLoc)
 }
 
 func (s *Schedule) Prev(t time.Time) time.Time {
@@ -101,6 +102,7 @@ func (s *Schedule) Prev(t time.Time) time.Time {
 		loc = s.Location
 	}
 
+	origLoc := t.Location()
 	t.In(loc)
 
 	subtracted := false
@@ -176,7 +178,7 @@ L:
 		}
 	}
 
-	return t
+	return t.In(origLoc)
 }
 
 // dayMatches returns true if the schedule's day-of-week and day-of-month