fix: restore linux watcher build

Author: linhay

.github/workflows/swift.yml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [macos-latest]
+        os: [macos-latest, ubuntu-latest]
         swift: ["6.0"]
     steps:
     - uses: actions/checkout@v4
@@ -26,4 +26,4 @@ jobs:
       run: swift build
 
     - name: Run Tests
-      run: swift test --enable-code-coverage
+      run: swift test --enable-code-coverage

Sources/STFilePath/DispatchSourceWatcher.swift

@@ -139,7 +139,7 @@ final class DispatchSourceWatcher: WatcherBackend, @unchecked Sendable {
 
         source.setCancelHandler { [fileDescriptor, watchDescriptor] in
             if watchDescriptor >= 0 {
-                _ = inotify_rm_watch(fileDescriptor, UInt32(watchDescriptor))
+                _ = inotify_rm_watch(fileDescriptor, watchDescriptor)
             }
             if fileDescriptor >= 0 {
                 close(fileDescriptor)