Fix logic error in Linux memory scanning (#1662)
Fix logic error in Linux memory scanning (#1662)

Memory-mapped files from tmpfs (major number = 0) are no longer ignored.
VirusTotal/yara,wxsBSD/yara,wxsBSD/yara,wxsBSD/yara,VirusTotal/yara,hillu/yara,hillu/yara,hillu/yara,wxsBSD/yara,hillu/yara,hillu/yara,VirusTotal/yara,VirusTotal/yara,wxsBSD/yara,VirusTotal/yara