nit fixes

Author: mbaetgen-wup

src/libprojectM/ProjectM.hpp

@@ -296,7 +296,7 @@ class PROJECTM_EXPORT ProjectM
     bool m_presetLocked{false};         //!< If true, the preset change event will not be sent.
     bool m_presetChangeNotified{false}; //!< Stores whether the user has been notified that projectM wants to switch the preset.
 
-    std::shared_ptr<Renderer::Platform::GLResolver> m_glResolver;                 //!< Function resolver for accessing GL backend. Stored for keeping ref count, may be null.
+    std::shared_ptr<Renderer::Platform::GLResolver> m_glResolver;                 //!< Function resolver for accessing GL backend. Stored for keeping ref count.
     std::unique_ptr<PresetFactoryManager> m_presetFactoryManager; //!< Provides access to all available preset factories.
 
     Audio::PCM m_audioStorage;                                                    //!< Audio data buffer and analyzer instance.

src/libprojectM/ProjectMCWrapper.cpp

@@ -84,7 +84,7 @@ projectm_handle projectm_create_with_opengl_load_proc(void* (*load_proc)(const c
         // obtain shared resolver instance
         auto glResolver = libprojectM::Renderer::Platform::GLResolver::Instance();
         // init resolver to discover gl function pointers and init GLAD
-        // Initialize() is guarded internally, may be executed multiple times
+        // Initialize() is guarded internally, may be called multiple times
         auto success = glResolver->Initialize(load_proc, user_data);
         if (!success)
         {

src/libprojectM/Renderer/PlatformGLResolver.cpp

@@ -37,7 +37,7 @@ auto GLResolver::Instance() -> std::shared_ptr<GLResolver>
     // client shared_ptr is released
     static std::weak_ptr<GLResolver> sharedInstance;
     auto instance = sharedInstance.lock();
-    if (!instance)
+    if (instance == nullptr)
     {
         instance = std::make_shared<GLResolver>();
         sharedInstance = instance;