Wait a maximum of 2 seconds for clipboard

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

dgl/src/WindowPrivateData.cpp

@@ -786,7 +786,8 @@ const void* Window::PrivateData::getClipboard(size_t& dataSize)
 
    #ifdef DGL_USING_X11
     // wait for type request, clipboardTypeId must be != 0 to be valid
-    while (clipboardTypeId == 0 && waitingForClipboardData)
+    int retry = static_cast<int>(2 / 0.03);
+    while (clipboardTypeId == 0 && waitingForClipboardData && --retry >= 0)
     {
         if (puglX11UpdateWithoutExposures(appData->world) != PUGL_SUCCESS)
             break;
@@ -802,7 +803,8 @@ const void* Window::PrivateData::getClipboard(size_t& dataSize)
 
    #ifdef DGL_USING_X11
     // wait for actual data (assumes offer was accepted)
-    while (waitingForClipboardData)
+    retry = static_cast<int>(2 / 0.03);
+    while (waitingForClipboardData && --retry >= 0)
     {
         if (puglX11UpdateWithoutExposures(appData->world) != PUGL_SUCCESS)
             break;

dgl/src/pugl.cpp

@@ -597,9 +597,8 @@ PuglStatus puglX11UpdateWithoutExposures(PuglWorld* const world)
 
     for (double t = startTime; !st && t < endTime; t = puglGetTime(world))
     {
-        if (!(st = pollX11Socket(world, endTime - t))) {
-            st = dispatchX11Events(world);
-        }
+        pollX11Socket(world, endTime - t);
+        st = dispatchX11Events(world);
     }
 
     world->impl->dispatchingEvents = wasDispatchingEvents;