Fix ktlint hook

In ag/18798895, I broke the early exit condition when the ktlint hook
would receive 0 Kotlin files. Since that CL, ktlint would always run on
a big number of files if th CL didn't contain any change in a .kt or
.kts file.

Bug: 235461679
Test: Manual
Change-Id: Iaf21df8e85943229c1d832b186825b41cf231b2d
1 file changed
tree: dffdf7e0d49949b39f154d2070eefb7bce140ad6
  1. .editorconfig
  2. ktlint-android-all.jar
  3. ktlint.py
  4. LICENSE