problem: using bg(fg)color_cb on matrix will cause the lua stack increase on every cb execute

[zcs_chenxiao <zcs@...>]

in iuplua_matrix_aux.c:

matrix_bgcolor_cb and matrix_fgcolor_cb, should lua_pop(L,4) instead lua_pop(L,1)

static int matrix_bg[fg]color_cb(Ihandle *self, int p0, int p1, unsigned int *p2, unsigned int *p3, unsigned int *p4)

{

  int ret;

  lua_State *L = iuplua_call_start(self, "bgcolor_cb");

  lua_pushnumber(L, p0);

  lua_pushnumber(L, p1);

  ret = iuplua_call_raw(L, 2+2, LUA_MULTRET);   /* 2 args + 2 args(errormsg, handle), variable number of returns */

  if (ret || lua_isnil(L, -1))

    return IUP_DEFAULT;

  ret = lua_tointeger(L,-1);

  if (ret == IUP_IGNORE) 

  {

    lua_pop(L, 1);

    return IUP_IGNORE;

  }

  *p2 = (unsigned int)lua_tointeger(L, -4); 

  *p3 = (unsigned int)lua_tointeger(L, -3); 

  *p4 = (unsigned int)lua_tointeger(L, -2); 

  lua_pop(L, 1);   -------------- this should be lua_pop(L,4);

  return IUP_DEFAULT;

}