HLE/Timers: Reset OneShot timers when they are acquired instead of when they're triggered.

Closes #1139

src/core/hle/kernel/timer.cpp

@@ -42,6 +42,9 @@ bool Timer::ShouldWait() {
 
 void Timer::Acquire() {
     ASSERT_MSG( !ShouldWait(), "object unavailable!");
+
+    if (reset_type == RESETTYPE_ONESHOT)
+        signaled = false;
 }
 
 void Timer::Set(s64 initial, s64 interval) {
@@ -84,9 +87,6 @@ static void TimerCallback(u64 timer_handle, int cycles_late) {
     // Resume all waiting threads
     timer->WakeupAllWaitingThreads();
 
-    if (timer->reset_type == RESETTYPE_ONESHOT)
-        timer->signaled = false;
-
     if (timer->interval_delay != 0) {
         // Reschedule the timer with the interval delay
         u64 interval_microseconds = timer->interval_delay / 1000;