Without the change build fails against gcc-11 as:
```
../../gcc-4.8.5/gcc/reload1.c:89:24:
error: use of an operand of type 'bool' in 'operator++' is forbidden in C++17
89 | (this_target_reload->x_spill_indirect_levels)
| ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
```
Co-authored-by: Dmitry Kalinkin <dmitry.kalinkin@gmail.com>
Co-authored-by: Dmitry Kalinkin <dmitry.kalinkin@gmail.com>
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