[llvm] [Hexagon] Fix -Wuninitialized warning (PR #125565)

[Oliver Stöneberg via llvm-commits]

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@@ -72,7 +72,7 @@ struct BitTracker {
   // Priority queue of instructions using modified registers, ordered by
   // their relative position in a basic block.
   struct UseQueueType {
-    UseQueueType() : Uses(Dist) {}
+    UseQueueType() : Dist(), Uses(Dist) {}
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firewave wrote:

The explicit `Dist()` is redundant.

https://github.com/llvm/llvm-project/pull/125565