1 files changed, 3 insertions, 3 deletions
diff --git a/src/VideoPlayer.cpp b/src/VideoPlayer.cpp
index ba7fb81..98d215d 100644
--- a/src/VideoPlayer.cpp
+++ b/src/VideoPlayer.cpp
@@ -262,9 +262,9 @@ namespace QuickMedia {
         std::vector<Window> result;
         Window root_window;
         Window parent_window;
-        Window *child_window;
-        unsigned int num_children;
-        if(XQueryTree(display, window, &root_window, &parent_window, &child_window, &num_children)) {
+        Window *child_window = nullptr;
+        unsigned int num_children = 0;
+        if(XQueryTree(display, window, &root_window, &parent_window, &child_window, &num_children) && child_window) {
             for(unsigned int i = 0; i < num_children; i++)
                 result.push_back(child_window[i]);
             XFree(child_window);