Implemented _seh_longjmp_unwind.

dlls/msvcrt/except.c

@@ -373,6 +373,14 @@ void _MSVCRT_longjmp(_JUMP_BUFFER *jmp, int retval, CONTEXT86* context)
 #endif /* i386 */
 
 /*********************************************************************
+ *		_seh_longjmp_unwind (MSVCRT.@)
+ */
+void __stdcall _seh_longjmp_unwind(_JUMP_BUFFER *jmp)
+{
+    _local_unwind2( (MSVCRT_EXCEPTION_FRAME *)jmp->Registration, jmp->TryLevel );
+}
+
+/*********************************************************************
  *		signal (MSVCRT.@)
  */
 void* MSVCRT_signal(int sig, MSVCRT_sig_handler_func func)

dlls/msvcrt/msvcrt.spec

@@ -423,7 +423,7 @@ init    MSVCRT_Init
 @ cdecl _safe_fprem1() _safe_fprem1
 @ cdecl _scalb( double long) _scalb
 @ cdecl _searchenv(str str str) _searchenv
-@ stub _seh_longjmp_unwind
+@ stdcall _seh_longjmp_unwind(ptr) _seh_longjmp_unwind
 @ stub _set_error_mode #(long)
 @ stub _set_sbh_threshold #(long)
 @ stub _seterrormode #(long)