avoid seldom but possible cases in projectile collision checks which would lead to infinite recursive loop
avoid seldom but possible cases in projectile collision checks which would lead to infinite recursive loop

git-svn-id: 0634bf30b6d7a21f2003d4a9f34c102a3ffa6fda@1957 34602234-ff1f-0410-a465-ea8f3b77ab7f

ProfessorKaos64/openlierox,ProfessorKaos64/openlierox,ProfessorKaos64/openlierox,ProfessorKaos64/openlierox,ProfessorKaos64/openlierox,ProfessorKaos64/openlierox,ProfessorKaos64/openlierox