Annot: Rename dx and dy

Fixes shadow warning
6 jobs for fix_more_shadows in 10 minutes and 33 seconds (queued for 26 seconds)
Status Job ID Name Coverage
  Build
passed #374761
build

00:03:31

passed #374771
build_android

00:06:23

passed #374763
build_clang_libcpp

00:03:32

passed #374769
build_clazy

00:04:53

passed #374768
build_mingw64_fedora

00:03:46

passed #374766
build_ubuntu_16_04

00:03:10