egl-wayland: set unprocessedFeedback flag

A prior commit added logic to reallocate window surfaces after receiving
a new dma-buf feedback from the compositor. This keys off of the
unprocessedFeedback flag, however currently that flag never actually
gets set. This change sets the flag after receiving a new feedback, so
that we will reallocate the surface on the next eglSwapBuffers call.

src/wayland-egldisplay.c

@@ -363,7 +363,7 @@ dmabuf_feedback_done(void *data, struct zwp_linux_dmabuf_feedback_v1 *dmabuf_fee
     WlEglDmaBufFeedback *feedback = data;
     (void) dmabuf_feedback;
 
-    feedback->feedbackDone = true;
+    feedback->feedbackDone = feedback->unprocessedFeedback = true;
 }
 
 _Static_assert(sizeof(WlEglDmaBufFormatTableEntry) == 16,
@@ -1085,6 +1085,9 @@ EGLBoolean wlEglInitializeHook(EGLDisplay dpy, EGLint *major, EGLint *minor)
         goto fail;
     }
 
+    /* We haven't created any surfaces yet, so no need to reallocate. */
+    display->defaultFeedback.unprocessedFeedback = false;
+
     if (major != NULL) {
         *major = display->devDpy->major;
     }

src/wayland-eglsurface.c

@@ -2351,6 +2351,9 @@ EGLSurface wlEglCreatePlatformWindowSurfaceHook(EGLDisplay dpy,
             err = EGL_BAD_ALLOC;
             goto fail;
         }
+
+        /* We haven't allocated our surface yet, so we can clear this flag. */
+        surface->feedback.unprocessedFeedback = false;
     }
 
     err = create_surface_context(surface);