Cut-and-paste typo was limiting concurrency

NOTREECHECKS=true
NOTRY=true
NOPRESUBMIT=true
Bug: skia:
Change-Id: I94065a2c0fdd536016060f906aead0bfb4e1e27b
Reviewed-on: https://skia-review.googlesource.com/149245
Reviewed-by: Allan MacKinnon <allanmac@google.com>
Commit-Queue: Allan MacKinnon <allanmac@google.com>
Auto-Submit: Allan MacKinnon <allanmac@google.com>

Author: Allan MacKinnon

src/compute/hs/cuda/hs_cuda.inl

@@ -472,13 +472,13 @@ hs_state_acquire(struct hs_state * const state,
       *indices    |=  1;
       return 0;
     }
-  else if (*indices & 2)
+  else if (state->pool & 2)
     {
       state->pool &= ~2;
       *indices    |=  2;
       return 1;
     }
-  else // if (*indices & 4)
+  else // (state->pool & 4)
     {
       state->pool &= ~4;
       *indices    |=  4;