tests/sigaltstack: fix build on aarch64
@@ -42,7 +42,7 @@ int main() {
"\t" "push $0");
#elif defined(__aarch64__)
asm volatile ("mov sp, %0\n"
- "\t" "stp x0, x1, [sp, #-16]!" :: "r"(uint64_t{0}));
+ "\t" "stp x0, x1, [sp, #-16]!" :: "r"((uint64_t)0));
#elif defined(__riscv) && __riscv_xlen == 64
asm volatile ("li sp, 0\n"
"\t" "sd zero, 0(sp)");
