Fix: Fix memory leak in HUD::Item using a dtor

Author: ptheywood

src/flamegpu/visualiser/HUD.cpp

@@ -153,6 +153,12 @@ HUD::Item::Item(std::shared_ptr<Overlay> overlay, const glm::ivec2 &offset, cons
     GL_CALL(glBufferData(GL_ELEMENT_ARRAY_BUFFER, 4*sizeof(int), &faces, GL_STATIC_DRAW));
     GL_CALL(glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0));
 }
+HUD::Item::~Item() {
+    if (data) {
+        free(data);
+        data = nullptr;
+    }
+}
 void HUD::Item::resizeWindow(const glm::uvec2 &dims) {
     // Track parameters, so when called from overlay we can reuse previous
     static glm::uvec2 _dims;

src/flamegpu/visualiser/HUD.h

@@ -50,6 +50,10 @@ class HUD {
          * @param zIndex The priority for which overlay should be on-top.
          */
         Item(std::shared_ptr<Overlay> overlay, const glm::ivec2 &offset, const glm::uvec2 &windowDims, AnchorV anchorV = AnchorV::Center, AnchorH anchorH = AnchorH::Center, const int &zIndex = 0);
+        /**
+         * Destructor to free manually allocated memory
+         */
+        ~Item();
         /**
          * Convenience resizeWindow(const glm::uvec2 &)
          * @param w The new window width