Fix the reload value in the examples: to get a SysTick interrupt every N clock pulses: set reload to N-1 see http://infocenter.arm.com/help/topic/com.arm.doc.dui0552a/BGBEEJHC.html#BABGACGG
the only change this results in in the example binaries is in the hackrf-jellybean/systick example, where the the check in systick_set_clocksource for overflowing from the stm32 area gets used.