Fix fileBrowserGetPath under some systems

Signed-off-by: falkTX <falktx@falktx.com>

distrho/extra/FileBrowserDialog.cpp

@@ -576,7 +576,11 @@ void fileBrowserClose(const FileBrowserHandle handle)
 
 const char* fileBrowserGetPath(const FileBrowserHandle handle)
 {
-    return handle->selectedFile != kSelectedFileCancelled ? handle->selectedFile : nullptr;
+    if (const char* const selectedFile = handle->selectedFile)
+        if (selectedFile != kSelectedFileCancelled && std::strcmp(selectedFile, kSelectedFileCancelled) != 0)
+            return selectedFile;
+
+    return nullptr;
 }
 
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