d3d8: Range-check GetPixelShaderConstant() indices to the d3d8 limit.

dlls/d3d8/d3d8_private.h

@@ -40,6 +40,7 @@
 #define D3DPRESENTFLAGS_MASK 0x00000fffu
 
 #define D3D8_MAX_VERTEX_SHADER_CONSTANTF 256
+#define D3D8_MAX_PIXEL_SHADER_CONSTANTF 8
 #define D3D8_MAX_STREAMS 16
 
 #define D3DFMT_RESZ MAKEFOURCC('R','E','S','Z')

dlls/d3d8/device.c

@@ -3295,7 +3295,8 @@ static HRESULT WINAPI d3d8_device_GetPixelShaderConstant(IDirect3DDevice8 *iface
 
     TRACE("iface %p, start_idx %u, constants %p, count %u.\n", iface, start_idx, constants, count);
 
-    if (!constants || start_idx >= WINED3D_MAX_PS_CONSTS_F || count > WINED3D_MAX_PS_CONSTS_F - start_idx)
+    if (!constants || start_idx >= D3D8_MAX_PIXEL_SHADER_CONSTANTF
+            || count > D3D8_MAX_PIXEL_SHADER_CONSTANTF - start_idx)
         return WINED3DERR_INVALIDCALL;
 
     wined3d_mutex_lock();