[flang] Fix warning when compiling with clang

Original-commit: flang-compiler/f18@0f18c3443a76c931c07c08d0b459ed70698ac122
Reviewed-on: https://github.com/flang-compiler/f18/pull/343
Tree-same-pre-rewrite: false

diff --git a/flang/lib/semantics/resolve-names-utils.h b/flang/lib/semantics/resolve-names-utils.h
index 965f2d4..a660667 100644 (file)
--- a/flang/lib/semantics/resolve-names-utils.h
+++ b/flang/lib/semantics/resolve-names-utils.h
@@ -21,7 +21,7 @@
 #include "../parser/message.h"
 
 namespace Fortran::parser {
-struct CharBlock;
+class CharBlock;
 struct DefinedOpName;
 struct GenericSpec;
 struct Name;