artf4107: clang-modernize was run on WPILib

Loops were converted to their range-based equivalents, variable types were replaced with auto where the type was already specified on the same line, the override keyword was added, and instances of NULL and assignments of 0 to pointers were replaced with nullptr.

Change-Id: If281e46a2e2e1c37f278d56df9915236d4b2c864

wpilibc/wpilibC++Devices/src/Timer.cpp

@@ -63,7 +63,7 @@ Timer::Timer()
     : m_startTime(0.0),
       m_accumulatedTime(0.0),
       m_running(false),
-      m_semaphore(0) {
+      m_semaphore(nullptr) {
   // Creates a semaphore to control access to critical regions.
   // Initially 'open'
   m_semaphore = initializeMutexNormal();