Better handling of pugl world creation failures

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

dgl/src/ApplicationPrivateData.cpp

@@ -160,17 +160,15 @@ void Application::PrivateData::quit()
 
 double Application::PrivateData::getTime() const
 {
-    DISTRHO_SAFE_ASSERT_RETURN(world != nullptr, 0.0);
-
-    return puglGetTime(world);
+    return world != nullptr ? puglGetTime(world) : 0.0;
 }
 
 void Application::PrivateData::setClassName(const char* const name)
 {
-    DISTRHO_SAFE_ASSERT_RETURN(world != nullptr,);
     DISTRHO_SAFE_ASSERT_RETURN(name != nullptr && name[0] != '\0',);
 
-    puglSetClassName(world, name);
+    if (world != nullptr)
+        puglSetClassName(world, name);
 }
 
 // --------------------------------------------------------------------------------------------------------------------

dgl/src/WindowPrivateData.cpp

@@ -66,7 +66,8 @@ static double getScaleFactorFromParent(const PuglView* const view)
 
 static PuglView* puglNewViewWithTransientParent(PuglWorld* const world, PuglView* const transientParentView)
 {
-    DISTRHO_SAFE_ASSERT_RETURN(world != nullptr, nullptr);
+    if (world == nullptr)
+        return nullptr;
 
     if (PuglView* const view = puglNewView(world))
     {
@@ -79,7 +80,8 @@ static PuglView* puglNewViewWithTransientParent(PuglWorld* const world, PuglView
 
 static PuglView* puglNewViewWithParentWindow(PuglWorld* const world, const uintptr_t parentWindowHandle)
 {
-    DISTRHO_SAFE_ASSERT_RETURN(world != nullptr, nullptr);
+    if (world == nullptr)
+        return nullptr;
 
     if (PuglView* const view = puglNewView(world))
     {
@@ -433,7 +435,7 @@ void Window::PrivateData::idleCallback()
 
 bool Window::PrivateData::addIdleCallback(IdleCallback* const callback, const uint timerFrequencyInMs)
 {
-    if (ignoreIdleCallbacks)
+    if (ignoreIdleCallbacks || view == nullptr)
         return false;
 
     if (timerFrequencyInMs == 0)
@@ -447,7 +449,7 @@ bool Window::PrivateData::addIdleCallback(IdleCallback* const callback, const ui
 
 bool Window::PrivateData::removeIdleCallback(IdleCallback* const callback)
 {
-    if (ignoreIdleCallbacks)
+    if (ignoreIdleCallbacks || view == nullptr)
         return false;
 
     if (std::find(appData->idleCallbacks.begin(),