Fix indentation of .c files

Required to make gst-indent linter on CI happy.
7 jobs for fix-c-indentation in 27 minutes and 48 seconds (queued for 1 second)
Status Job ID Name Coverage
  Preparation
passed #64241
gst indent

00:00:13

passed #64240
manifest

00:00:17

 
  Build
passed #64242
build fedora x86_64

00:03:29

 
  Test
passed #64265
check fedora

00:14:39

failed #64243
check fedora

00:15:05

 
  Full Builds
passed #64244
build android arm64 api28

00:03:00

passed #64245
build cerbero fedora x86_64

00:09:20