Calls x.imag() instead of imag(x) when x is a complex number since the former is a constexpr while the later isn't. This fixes compilation errors triggered by nvcc on Mac.
Calls x.imag() instead of imag(x) when x is a complex number since the former
is a constexpr while the later isn't. This fixes compilation errors triggered by nvcc on Mac.

ritsu1228/eigen,ROCmSoftwarePlatform/hipeigen,ROCmSoftwarePlatform/hipeigen,pasuka/eigen,ritsu1228/eigen,ROCmSoftwarePlatform/hipeigen,ritsu1228/eigen,pasuka/eigen,ritsu1228/eigen,pasuka/eigen,pasuka/eigen,ritsu1228/eigen,ROCmSoftwarePlatform/hipeigen,pasuka/eigen