Fix GpsTimeStamp format string

Bug: 26816278
Change-Id: I01102e0ac18fdd7e782a997af3fe571be3237ea4
diff --git a/gpsinfo.c b/gpsinfo.c
index cbf261e..ba2e82a 100644
--- a/gpsinfo.c
+++ b/gpsinfo.c
@@ -257,7 +257,7 @@
 
             case TAG_GPS_TIMESTAMP:
                 snprintf(ImageInfo.GpsTimeStamp,
-                    sizeof(ImageInfo.GpsTimeStamp), "%d:%d:%d",
+                    sizeof(ImageInfo.GpsTimeStamp), "%02d:%02d:%02d",
                     (int) ConvertAnyFormat(ValuePtr, Format),
                     (int) ConvertAnyFormat(ValuePtr + 8, Format),
                     (int) ConvertAnyFormat(ValuePtr + 16, Format)