misra: Fix crash on rule 8.2 (#3310)

The example code that reproduces this crash:

```
int misra_8_2_o(
    const uint32_t a1,
    const uint8_t *const a2
)
{ return *a2 + a1; }
int misra_8_2_p(
    const uint32_t a1,
    const uint8_t *const a2
);
```

The unit test was not added because it looks like a typo and regressions
are unlikely.

addons/misra.py

@@ -1471,7 +1471,7 @@ class MisraChecker:
                     for _ in range(count):
                         rawToken = rawToken.next
                         # Skip comments
-                        while rawTokens and (rawToken.str.startswith('/*') or rawToken.str.startswith('//')):
+                        while rawToken and (rawToken.str.startswith('/*') or rawToken.str.startswith('//')):
                             rawToken = rawToken.next
                         if rawToken is None:
                             break