winedbg: Ensure the stack pointer is also passed to StackWalk.

programs/winedbg/stack.c

@@ -178,6 +178,7 @@ unsigned stack_fetch_frames(void)
     memset(&sf, 0, sizeof(sf));
     memory_get_current_frame(&sf.AddrFrame);
     memory_get_current_pc(&sf.AddrPC);
+    memory_get_current_stack(&sf.AddrStack);
 
     /* don't confuse StackWalk by passing in inconsistent addresses */
     if ((sf.AddrPC.Mode == AddrModeFlat) && (sf.AddrFrame.Mode != AddrModeFlat))