Fix a clang static analyzer warning
Fix a clang static analyzer warning

Just workaround a pointless warning, we just want to ignore
this variable, but clang is more picky than gcc.

kissthink/unionfs-fuse-1,evnu/unionfs-fuse,evnu/unionfs-fuse,evnu/unionfs-fuse,yogoloth/unionfs-fuse,yogoloth/unionfs-fuse,kissthink/unionfs-fuse-1,kissthink/unionfs-fuse-1,yogoloth/unionfs-fuse