MT#62181 wheeltimer: use local reqs_process

There is no need to keep this in the object as it's not used anywhere
else.

Change-Id: Ia94a4fa12ef925e0a3d020f859d4c746d53e945f

core/sip/wheeltimer.cpp

@@ -157,6 +157,7 @@ void _wheeltimer::turn_wheel()
 void _wheeltimer::process_events()
 {
     // Swap the lists for timer insertion/deletion requests and reset wake condition
+    std::deque<timer_req> reqs_process;
     std::unique_lock<AmMutex> lock(reqs_m);
     reqs_cond.set(false);
     reqs_process.swap(reqs_backlog);

core/sip/wheeltimer.h

@@ -125,7 +125,6 @@ class _wheeltimer:
     AmMutex               reqs_m;
     AmCondition     reqs_cond; // to wake up worker thread when a request is added
     std::deque<timer_req> reqs_backlog;
-    std::deque<timer_req> reqs_process;
 
     u_int32_t wall_clock; // 32 bits, "resolution" based ticks starting from epoch