Avoid division by a zero complex
Avoid division by a zero complex

ritsu1228/eigen,pasuka/eigen,ritsu1228/eigen,TSC21/Eigen,TSC21/Eigen,pasuka/eigen,pasuka/eigen,ritsu1228/eigen,ritsu1228/eigen,ritsu1228/eigen,pasuka/eigen,TSC21/Eigen,pasuka/eigen,TSC21/Eigen,ROCmSoftwarePlatform/hipeigen,ROCmSoftwarePlatform/hipeigen,ROCmSoftwarePlatform/hipeigen,ROCmSoftwarePlatform/hipeigen