Fixed line number of DSLParser struct errors

RedeclareStructTypeWithName was reporting an error on the wrong line.

Change-Id: Ibe954ca5013dbedca8cf015660cf3d28fa97987d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/445101
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
1 file changed