Include .c files too

bin/clang-format-fix.ps1

@@ -109,16 +109,16 @@ function Test-Excluded($fullPath) {
 }
 
 if ($g) {
-    # Only git-modified *.cpp / *.h files
+    # Only git-modified *.cpp / *.c / *.h files
     # Covers both staged and unstaged changes
     $files = @(git -C $repoRoot diff --name-only HEAD) +
              @(git -C $repoRoot diff --name-only --cached) |
         Sort-Object -Unique |
-        Where-Object { $_ -match '\.(cpp|h)$' } |
+        Where-Object { $_ -match '\.(cpp|c|h)$' } |
         ForEach-Object { Get-Item (Join-Path $repoRoot $_) -ErrorAction SilentlyContinue } |
         Where-Object { $_ -and -not (Test-Excluded $_.FullName) }
 } else {
-    $files = Get-ChildItem -Path $repoRoot -Recurse -Include *.cpp, *.h -File |
+    $files = Get-ChildItem -Path $repoRoot -Recurse -Include *.cpp, *.c, *.h -File |
         Where-Object { -not (Test-Excluded $_.FullName) }
 }