REP instructions now handle trap flag correctly, Windows NT 3.51 now works on 386 systems.

src/386_dynarec.c

@@ -297,6 +297,9 @@ int rep386(int fv)
           that high frequency timers still work okay. This amount is different
           for interpreter and recompiler*/
         int cycles_end = cycles - ((is386 && cpu_use_dynarec) ? 1000 : 100);
+
+        if (trap)
+                cycles_end = cycles+1; /*Force the instruction to end after only one iteration when trap flag set*/
         
         cpu_reps++;