[MLIR][GPU] Fix forward declaration of Region class.

Stephan Herhut · Stephan Herhut · commit e4e122aa1d59 · 2020-02-25T12:09:42.000+01:00
I forward declared mlir::Region as a struct by mistake :(
diff --git a/mlir/include/mlir/Dialect/GPU/ParallelLoopMapper.h b/mlir/include/mlir/Dialect/GPU/ParallelLoopMapper.h
@@ -16,7 +16,7 @@
 
 namespace mlir {
 
-struct Region;
+class Region;
 
 namespace gpu {
 
