Add casts to avoid warnings when using unity in CPP

[lucasssvaz]

Summary

TEST_ASSERT_EACH_EQUAL_FLOAT and TEST_ASSERT_EACH_EQUAL_DOUBLE fail to compile in C++ because UnityFloatToPtr() / UnityDoubleToPtr() return UNITY_INTERNAL_PTR (const void*), while UnityAssertWithinFloatArray() / UnityAssertWithinDoubleArray() expect const UNITY_FLOAT* / const UNITY_DOUBLE*.

C allows that conversion implicitly; C++ does not.

Fix

Cast the helper return value in the internal macros:

(const UNITY_FLOAT*)UnityFloatToPtr(expected)
(const UNITY_DOUBLE*)UnityDoubleToPtr(expected)

Integer TEST_ASSERT_EACH_EQUAL_* macros are unaffected because they call UnityAssertEqualIntArray(), which already takes UNITY_INTERNAL_PTR.

Tested locally. Solves the issue.