Fix bug when trying to destroy an arena without being created
Fix bug when trying to destroy an arena without being created

hillu/yara,msuvajac/yara,Security513/yara,frbapolkosnik/yara,bmagistro/yara,jshufelt/yara,MeteorAdminz/yara,foreni-packages/yara,digideskio/yara,Security513/yara,bmagistro/yara,kallanreed/yara,frbapolkosnik/yara,hillu/yara,0x0mar/yara,wxsBSD/yara,binsrc/yara,plusvic/yara,VirusTotal/yara,binsrc/yara,rednaga/yara,tdr130/yara,plusvic/yara,cblichmann/yara,cblichmann/yara,rednaga/yara,tanium/yara,0x0mar/yara,mgoffin/yara,wxsBSD/yara,wxsBSD/yara,jshufelt/yara,rayyang2000/yara,frbapolkosnik/yara,VirusTotal/yara,jshufelt/yara,plusvic/yara,wxsBSD/yara,cblichmann/yara,rednaga/yara,mgoffin/yara,msuvajac/yara,tanium/yara,kallanreed/yara,jshufelt/yara,kallanreed/yara,VirusTotal/yara,smaudet/yara,rayyang2000/yara,rayyang2000/yara,tanium/yara,pombredanne/yara,plusvic/yara,hillu/yara,MeteorAdminz/yara,msuvajac/yara,digideskio/yara,hillu/yara,pombredanne/yara,neatsun/yara,jpypi/yara,digideskio/yara,smaudet/yara,smaudet/yara,MeteorAdminz/yara,tdr130/yara,tdr130/yara,Security513/yara,0x0mar/yara,beikezcs/yara,foreni-packages/yara,binsrc/yara,hillu/yara,beikezcs/yara,0x0mar/yara,pombredanne/yara,jpypi/yara,smaudet/yara,VirusTotal/yara,beikezcs/yara,mgoffin/yara,bmagistro/yara,neatsun/yara,cblichmann/yara,digideskio/yara,wxsBSD/yara,neatsun/yara,pombredanne/yara,pombredanne/yara,foreni-packages/yara,VirusTotal/yara,plusvic/yara,jpypi/yara,binsrc/yara,cblichmann/yara,frbapolkosnik/yara,mgoffin/yara