Fix #2149. When building the requestedIndicesMap in one case the shif…

…t by minIndex was missing.

pxr/usdImaging/usdImaging/instanceAdapter.cpp

@@ -2626,7 +2626,7 @@ UsdImagingInstanceAdapter::GetScenePrimPaths(
 
             // set bits for all requested indices to true
             for (size_t i = 0; i < instanceIndices.size(); i++) {
-                requestedIndicesMap[instanceIndices[i]] = i;
+                requestedIndicesMap[instanceIndices[i] - minIdx] = i;
             }
 
             result.resize(instanceIndices.size());