Make constructors explicit

modules/debugging/rendering/debugrenderer.h

@@ -55,7 +55,7 @@ public:
     /**
      * Instantiate a new DebugRenderer with a custom shader program.
      */
-    DebugRenderer(std::unique_ptr<ghoul::opengl::ProgramObject> programObject);
+    explicit DebugRenderer(std::unique_ptr<ghoul::opengl::ProgramObject> programObject);
     ~DebugRenderer() = default;
 
     /**

modules/debugging/rendering/screenspacedebugplane.h

@@ -33,7 +33,7 @@ namespace openspace {
 
 class ScreenSpaceDebugPlane : public ScreenSpaceRenderable {
 public:
-    ScreenSpaceDebugPlane(const ghoul::Dictionary& dictionary);
+    explicit ScreenSpaceDebugPlane(const ghoul::Dictionary& dictionary);
 
     static documentation::Documentation Documentation();