d3dx9: Simplify D3DXComputeBoundingSphere.

dlls/d3dx9_36/mesh.c

@@ -1991,7 +1991,7 @@ HRESULT WINAPI D3DXComputeBoundingBox(CONST D3DXVECTOR3 *pfirstposition, DWORD n
  */
 HRESULT WINAPI D3DXComputeBoundingSphere(CONST D3DXVECTOR3* pfirstposition, DWORD numvertices, DWORD dwstride, D3DXVECTOR3 *pcenter, FLOAT *pradius)
 {
-    D3DXVECTOR3 temp, temp1;
+    D3DXVECTOR3 temp;
     FLOAT d;
     unsigned int i;
 
@@ -2000,16 +2000,12 @@ HRESULT WINAPI D3DXComputeBoundingSphere(CONST D3DXVECTOR3* pfirstposition, DWOR
     temp.x = 0.0f;
     temp.y = 0.0f;
     temp.z = 0.0f;
-    temp1 = temp;
     *pradius = 0.0f;
 
     for(i=0; i<numvertices; i++)
-    {
-        D3DXVec3Add(&temp1, &temp, (const D3DXVECTOR3*)((const char*)pfirstposition + dwstride * i));
-        temp = temp1;
-    }
+        D3DXVec3Add(&temp, &temp, (const D3DXVECTOR3*)((const char*)pfirstposition + dwstride * i));
 
-    D3DXVec3Scale(pcenter, &temp, 1.0f/((FLOAT)numvertices));
+    D3DXVec3Scale(pcenter, &temp, 1.0f / numvertices);
 
     for(i=0; i<numvertices; i++)
     {