STM32F3: blink example: corrected uart code example now compiles
STM32F3: blink example: corrected uart code
example now compiles

chrism333/xpcc,chrism333/xpcc,dergraaf/xpcc,dergraaf/xpcc,chrism333/xpcc,dergraaf/xpcc,chrism333/xpcc,dergraaf/xpcc