New file msvcrt/excpt.h. Move some stuff out of winnt.h into it.

diff --git a/include/msvcrt/excpt.h b/include/msvcrt/excpt.h
new file mode 100644
index 0000000..e57f90a
--- /dev/null
+++ b/include/msvcrt/excpt.h
@@ -0,0 +1,24 @@
+#ifndef __WINE_EXCPT_H
+#define __WINE_EXCPT_H
+
+/*
+ * Return values from the actual exception handlers
+ */
+typedef enum _EXCEPTION_DISPOSITION
+{
+  ExceptionContinueExecution,
+  ExceptionContinueSearch,
+  ExceptionNestedException,
+  ExceptionCollidedUnwind
+} EXCEPTION_DISPOSITION;
+
+/*
+ * Return values from filters in except() and from UnhandledExceptionFilter
+ */
+#define EXCEPTION_EXECUTE_HANDLER        1
+#define EXCEPTION_CONTINUE_SEARCH        0
+#define EXCEPTION_CONTINUE_EXECUTION    -1
+
+
+
+#endif /* __WINE_EXCPT_H */