Published 1.5.1 calls glGetActiveUniformsiv with a count argument the addon
does not take, so the call is rejected and every uniform-block query fails.
Anything using std140 uniform blocks loses its block indices, which a caller
reads as a uniform that does not exist.

Also carries the getIndexedParameter fix: the addon returns indexed query
values rather than writing an out-parameter, so those queries all read 0.