Merge branch 'mc/use-ulong-max'

* mc/use-ulong-max:
  src:arduino-timer:ticks use ULONG_MAX

Author: contrem

src/arduino-timer.h

@@ -41,6 +41,8 @@
 #include <WProgram.h>
 #endif
 
+#include <limits.h>
+
 #ifndef TIMER_MAX_TASKS
     #define TIMER_MAX_TASKS 0x10
 #endif
@@ -142,7 +144,7 @@ class Timer {
     unsigned long
     ticks() const
     {
-        unsigned long ticks = (unsigned long)-1, elapsed;
+        unsigned long ticks = ULONG_MAX, elapsed;
         const unsigned long start = time_func();
 
         timer_foreach_const_task(task) {
@@ -162,7 +164,7 @@ class Timer {
 
         elapsed = time_func() - start;
 
-        if (elapsed >= ticks || ticks == (unsigned long)-1) ticks = 0;
+        if (elapsed >= ticks || ticks == ULONG_MAX) ticks = 0;
         else ticks -= elapsed;
 
         return ticks;