small fix

diff --git a/lib/gdi/grc.cpp b/lib/gdi/grc.cpp
index a9bac4a..274d221 100644 (file)
--- a/lib/gdi/grc.cpp
+++ b/lib/gdi/grc.cpp
@@ -125,7 +125,8 @@ void *gRC::thread()
                                m_notify_pump.send(1);
                        }
 #ifndef SYNC_PAINT
-                       pthread_cond_wait(&cond, &mutex);
+                       while(rp == wp)
+                               pthread_cond_wait(&cond, &mutex);
                        pthread_mutex_unlock(&mutex);
 #endif
                }