Added a stub for setjmp.

dlls/crtdll/crtdll.spec

@@ -266,7 +266,7 @@ init    CRTDLL_Init
 261 stub _scalb
 262 stub _searchenv
 263 stub _seterrormode
-264 stub _setjmp
+264 cdecl _setjmp (ptr) CRTDLL__setjmp
 265 cdecl _setmode(long long) CRTDLL__setmode
 266 stub _setsystime
 267 cdecl _sleep(long) CRTDLL__sleep

dlls/crtdll/crtdll_main.c

@@ -304,6 +304,14 @@ void __cdecl CRTDLL__local_unwind2( PEXCEPTION_FRAME endframe, DWORD nr )
 {
     TRACE("(%p,%ld)\n",endframe,nr);
 }
+/*******************************************************************
+ *         _setjmp  (CRTDLL.264)
+ */
+INT __cdecl CRTDLL__setjmp(LPDWORD *jmpbuf)
+{
+  FIXME(":(%p): stub\n",jmpbuf);
+  return 0;
+}
 /*********************************************************************
  *                  _read     (CRTDLL.256)
  *