[PATCH] d3dx9: Correctly handle NULL constant state for objects on 64 bit arch.

[Paul Gofman]

Signed-off-by: Paul Gofman 
---
 dlls/d3dx9_36/effect.c | 25 ++++++++++++++++++++++---
 1 file changed, 22 insertions(+), 3 deletions(-)

diff --git a/dlls/d3dx9_36/effect.c b/dlls/d3dx9_36/effect.c
index 7d686a435d..5be2725d3c 100644
--- a/dlls/d3dx9_36/effect.c
+++ b/dlls/d3dx9_36/effect.c
@@ -973,6 +973,8 @@ static HRESULT d3dx9_get_param_value_ptr(struct d3dx_pass *pass, struct d3dx_sta
         BOOL update_all, BOOL *param_dirty)
 {
     struct d3dx_parameter *param = &state->parameter;
+    enum STATE_CLASS state_class;
+    static void *null_ptr;

*param_value = NULL;
     *out_param = NULL;
@@ -981,13 +983,30 @@ static HRESULT d3dx9_get_param_value_ptr(struct d3dx_pass *pass, struct d3dx_sta
     switch (state->type)
     {
         case ST_PARAMETER:
-            param = state->referenced_param;
+            *out_param = param = state->referenced_param;
+            *param_value = param->data;
             *param_dirty = is_param_dirty(param, pass->update_version);
-            /* fallthrough */
+            return D3D_OK;
+
         case ST_CONSTANT:
             *out_param = param;
-            *param_value = param->data;
+
+            if (((state_class = state_table[state->operation].class) == SC_VERTEXSHADER
+                    || state_class == SC_PIXELSHADER || state_class == SC_TEXTURE)
+                    && param->bytes < sizeof(void *))
+            {
+                *param_value = &null_ptr;
+
+                if (param->type != D3DXPT_INT || *(unsigned int *)param->data)
+                    FIXME("Unexpected parameter for object, param->type %u, param->class %u.\n",
+                            param->type, param->class);
+            }
+            else
+            {
+                 *param_value = param->data;
+            }
             return D3D_OK;
+
         case ST_ARRAY_SELECTOR:
         {
             unsigned int array_idx;