server: Fix FPU registers in get_thread_context()

[Petr Tesarik]

Hi,

this patch fixes a bug in get_thread_context(). Currently, this
routine assumes that all registers except debug registers are saved in
thread->context if it exists.  However, it does not include FPU
registers.

IMO, we should not blindly assume which registers are present in
thread->context but look at ContextFlags.

BTW I found this bug when winedbg stopped working with programs using
the FPU.

ChangeLog:

* Look at ContextFlags to see which registers are saved in
  thread->context.
-------------- next part --------------
Index: context_i386.c
===================================================================
RCS file: /home/wine/wine/server/context_i386.c,v
retrieving revision 1.37
diff -u -r1.37 context_i386.c
--- context_i386.c	14 Feb 2006 13:35:01 -0000	1.37
+++ context_i386.c	27 Mar 2006 07:48:32 -0000
@@ -596,7 +596,7 @@
     if (thread->context)  /* thread is inside an exception event or suspended */
     {
         copy_context( context, thread->context, flags );
-        flags &= CONTEXT_DEBUG_REGISTERS;
+        flags &= ~thread->context->ContextFlags | CONTEXT_DEBUG_REGISTERS;
     }
 
     if (flags && suspend_for_ptrace( thread ))