Fix rendering on Parallels VMs with graphics set to "low"

In LLRender::syncMatrices(), treat uniform location 0 as valid when uploading the inverse model-view, inverse projection, and identity matrices. Only location -1 indicates that a uniform is absent. (This is a zero-based index.)

Fix Parallels GLSL compilation by:

- renaming the local waterClip() wrapper to avoid an overload conflict

- returning float literals (not ints) from a few functions declared to return float

0 files changed, 0 insertions, 0 deletions