fixed vulnerability (reading kernel memory from userspace) in sysfn 48.2

git-svn-id: svn://kolibrios.org@8712 a494cfbc-eb01-0410-851d-a64ba20cac60

kernel/trunk/gui/window.inc

@@ -128,6 +128,10 @@ dd  .setSkinUnicode
         cmp     edx, 192
         jnae    @f
         mov     edx, 192 ; max size
+@@:
+        stdcall is_region_userspace, esi, edx    ;
+        jnz     @f                               ;
+        ret                                      ;
 @@:
         mov     edi, common_colours
         mov     ecx, edx