Color: Fix -Wtype-limits GCC warning after refactoring

Warning from GCC 10.2.0 with `warnings=extra`:
```
./core/math/color.h: In member function 'int32_t Color::get_r8() const':
./core/typedefs.h:107:42: error: comparison of unsigned expression in '< 0' is always false [-Werror=type-limits]
  107 | #define CLAMP(m_a, m_min, m_max) (((m_a) < (m_min)) ? (m_min) : (((m_a) > (m_max)) ? m_max : m_a))
      |                                    ~~~~~~^~~~~~~~~
./core/math/color.h:201:49: note: in expansion of macro 'CLAMP'
  201 |  _FORCE_INLINE_ int32_t get_r8() const { return CLAMP(uint32_t(r * 255.0), 0, 255); }
      |                                                 ^~~~~
```

Also some code consistency changes while at it.

0 files changed, 0 insertions, 0 deletions