Fix issue with boolean external variables being defined as integer
Fix issue with boolean external variables being defined as integer

wxsBSD/yara,plusvic/yara,rednaga/yara,msuvajac/yara,plusvic/yara,plusvic/yara,hillu/yara,tanium/yara,VirusTotal/yara,bmagistro/yara,pombredanne/yara,cblichmann/yara,msuvajac/yara,wxsBSD/yara,pombredanne/yara,pombredanne/yara,hillu/yara,msuvajac/yara,hillu/yara,pombredanne/yara,bmagistro/yara,VirusTotal/yara,plusvic/yara,VirusTotal/yara,jpypi/yara,rednaga/yara,kallanreed/yara,kallanreed/yara,cblichmann/yara,rednaga/yara,pombredanne/yara,cblichmann/yara,VirusTotal/yara,jpypi/yara,tanium/yara,wxsBSD/yara,plusvic/yara,hillu/yara,kallanreed/yara,MeteorAdminz/yara,wxsBSD/yara,MeteorAdminz/yara,tanium/yara,bmagistro/yara,VirusTotal/yara,MeteorAdminz/yara,hillu/yara,wxsBSD/yara,jpypi/yara,cblichmann/yara,cblichmann/yara