cppcheck bug

cppcheck output

$ cppcheck --enable=style uint128mul.c
Checking uint128mul.c ...
[uint128mul.c:9]: (style) The scope of the variable 'botLo' can be reduced.

uint128mul.c

typedef struct {
    unsigned long long hi, lo;
} uint128_t;

typedef unsigned long long uint64_t;

uint128_t long_multiply(/* split uint128_t */ uint64_t topLo, uint64_t topHi)
{
    uint64_t botLo = 0x1234567890ABCDEFULL;
    uint64_t retHi;

    /* widening multiply */
    __asm__("mulq %[botLo]" : "+a" (topLo), "=d" (retHi) : [botLo] "r" (botLo));

    if (topHi != 0) {
        topHi *= botLo;
    }

    return (uint128_t) { topLo, topHi };
}