cygwin 1.7 build fixes
[openocd.git] / src / flash / mflash.c
index 123d61c..5c8ca8c 100644 (file)
@@ -1345,7 +1345,8 @@ COMMAND_HANDLER(mg_bank_cmd)
        char *str;
        mflash_bank->rst_pin.num = strtoul(CMD_ARGV[2], &str, 0);
        if (*str)
-               mflash_bank->rst_pin.port[0] = (uint16_t)tolower(str[0]);
+               mflash_bank->rst_pin.port[0] = (uint16_t)
+                               tolower((unsigned)str[0]);
 
        mflash_bank->target = target;