fs_mgr: fix potential uses of nullptr
Clang's static analyzer flagged the following potential null pointer
dereferences. Looks like a transitive caller of this function has
```
if (change) *change = foo;
```
...and no nullness checks between that and these unconditional
assignments to `*change`.
> system/core/fs_mgr/fs_mgr_overlayfs.cpp:1100:13: warning: Dereference
of null pointer (loaded from variable 'change')
[clang-analyzer-core.NullDereference] >
system/core/fs_mgr/fs_mgr_overlayfs.cpp:1167:17: warning: Dereference of
null pointer (loaded from variable 'change')
[clang-analyzer-core.NullDereference]
Bug: None
Test: TreeHugger
Change-Id: I656e3b0f56b18ec3ca3d1db773feb81adf163122
1 file changed