cygwin 1.7 build fixes

[fw/openocd] / src / flash / mflash.c

diff --git a/src/flash/mflash.c b/src/flash/mflash.c
index 123d61ce82e1afd5d69f5186a593f8dd7085e7ff..5c8ca8c16b46cc6912301c814cc3faa38a2e8999 100644 (file)
--- a/src/flash/mflash.c
+++ b/src/flash/mflash.c
@@ -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;