STM32: fix build warning.

Fix the following build warning:
  bertos/cpu/cortex-m3/drv/clock_stm32.c: In function 'pll_clock':
  bertos/cpu/cortex-m3/drv/clock_stm32.c:74: warning: comparison between signed and unsigned integer expressions

git-svn-id: https://src.develer.com/svnoss/bertos/trunk@3736 38d2e660-2303-0410-9eaa-f027e97ec537

diff --git a/bertos/cpu/cortex-m3/drv/clock_stm32.c b/bertos/cpu/cortex-m3/drv/clock_stm32.c
index c225da8d767175e702764e1ca7ce03485db7839d..8e9e86d0b5c775f041917e1b2f6172cce7961b81 100644 (file)
--- a/bertos/cpu/cortex-m3/drv/clock_stm32.c
+++ b/bertos/cpu/cortex-m3/drv/clock_stm32.c
@@ -66,7 +66,7 @@ INLINE int rcc_get_flag_status(uint32_t flag)
 
 INLINE uint16_t pll_clock(void)
 {
-       int div, mul;
+       unsigned int div, mul;
 
        /* Hopefully this is evaluate at compile time... */
        for (div = 2; div; div--)