release client list mutex earlier

libvncserver/rfbserver.c

@@ -425,6 +425,8 @@ rfbClientConnectionGone(cl)
       } while(i>0);
 #endif
 
+    UNLOCK(rfbClientListMutex);
+
     if(cl->sock>=0)
        FD_CLR(cl->sock,&(cl->screen->allFds));
 
@@ -454,8 +456,6 @@ rfbClientConnectionGone(cl)
     sraRgnDestroy(cl->requestedRegion);
     sraRgnDestroy(cl->copyRegion);
 
-    UNLOCK(rfbClientListMutex);
-
     if (cl->translateLookupTable) free(cl->translateLookupTable);
 
     TINI_COND(cl->updateCond);