Include ntdll_misc.h to avoid undefined reference to GetProcessHeap
when compiled without optimization.

diff --git a/dlls/ntdll/exception.c b/dlls/ntdll/exception.c
index b95c902..48e222b 100644
--- a/dlls/ntdll/exception.c
+++ b/dlls/ntdll/exception.c
@@ -36,6 +36,7 @@
 #include "wine/list.h"
 #include "wine/debug.h"
 #include "excpt.h"
+#include "ntdll_misc.h"
 
 WINE_DEFAULT_DEBUG_CHANNEL(seh);