Fix -Wstrict-prototypes error when building skcms.

True C code needs `(void)` for an empty parameter list.
This allows `ninja -f ninja/clang.native` to build successfully on
my machine.

Change-Id: I9586c0a69912ea133893e45510ad397bda1cc7b6
Reviewed-on: https://skia-review.googlesource.com/c/skcms/+/771418
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
1 file changed