update OpenAL-Soft to 1.24.3.

libs/openal-soft/core/effectslot.cpp

@@ -11,8 +11,5 @@
 
 std::unique_ptr<EffectSlotArray> EffectSlot::CreatePtrArray(size_t count)
 {
-    /* Allocate space for twice as many pointers, so the mixer has scratch
-     * space to store a sorted list during mixing.
-     */
-    return std::unique_ptr<EffectSlotArray>{new(FamCount{count*2}) EffectSlotArray(count)};
+    return std::unique_ptr<EffectSlotArray>{new(FamCount{count}) EffectSlotArray(count)};
 }