Avoid a potential NRE if the nested type mapping is wrong (obfuscator)
Avoid a potential NRE if the nested type mapping is wrong (obfuscator)

ttRevan/cecil,sailro/cecil,gluck/cecil,kzu/cecil,mono/cecil,fnajera-rac-de/cecil,joj/cecil,SiliconStudio/Mono.Cecil,jbevain/cecil,xen2/cecil,furesoft/cecil,cgourlay/cecil,saynomoo/cecil