NamespaceDecl: Call non-virtual method inside virtual method, not the other way round.
NamespaceDecl: Call non-virtual method inside virtual method, not the other way round.

Moves the virtual call out of a hot path during lookup, no other functionality change.

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@152124 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang