Small fix to use SlangResult (#2149)

* Use SlangResult value. Make legacy SLANG_ERROR_ macros use SlangResult values.

1 files changed, 2 insertions, 3 deletions

diff --git a/slang.h b/slang.h
index 99d7f0d62..1d4c517b5 100644
--- a/slang.h
+++ b/slang.h
@@ -4471,9 +4471,8 @@ declarations over time.
 extern "C" {
 #endif
 
-
-#define SLANG_ERROR_INSUFFICIENT_BUFFER -1
-#define SLANG_ERROR_INVALID_PARAMETER -2
+#define SLANG_ERROR_INSUFFICIENT_BUFFER SLANG_E_BUFFER_TOO_SMALL
+#define SLANG_ERROR_INVALID_PARAMETER SLANG_E_INVALID_ARG
 
 SLANG_API char const* spGetTranslationUnitSource(
     SlangCompileRequest*    request,