tsan: fix style
tsan: fix style

Usually we roll the variable declaration into the condition in cases like this.



git-svn-id: c199f293c43da69278bea8e88f92242bf3aa95f7@224755 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt,llvm-mirror/compiler-rt