Fix #116346: USD importer ignores camera near clipping plane

Seems the actual change somehow got swallowed in 7a9284107d / !112905
[the corresponding clamping comment is already there :)].

Now just add back.

Thx @Matt-M for the initial investigation.

Pull Request: https://projects.blender.org/blender/blender/pulls/116353

source/blender/io/usd/intern/usd_reader_camera.cc

@@ -82,6 +82,7 @@ void USDCameraReader::read_object_data(Main *bmain, const double motionSampleTim
 
   /* Call UncheckedGet() to silence compiler warnings.
    * Clamp to 1e-6 matching range defined in RNA. */
+  bcam->clip_start = max_ff(1e-6f, clippingRangeVal.UncheckedGet<pxr::GfVec2f>()[0]);
   bcam->clip_end = clippingRangeVal.UncheckedGet<pxr::GfVec2f>()[1];
 
   bcam->dof.focus_distance = focalDistanceVal.Get<float>();