fixed occassional crash when closing one of many concurrently opened signal processing root patches

pd/src/g_canvas.c

@@ -911,11 +911,11 @@ void canvas_free(t_canvas *x)
         freebytes(x->gl_env->ce_argv, x->gl_env->ce_argc * sizeof(t_atom));
         freebytes(x->gl_env, sizeof(*x->gl_env));
     }
-    canvas_resume_dsp(dspstate);
     glist_cleanup(x);
     gfxstub_deleteforkey(x);        /* probably unnecessary */
     if (!x->gl_owner)
         canvas_takeofflist(x);
+    canvas_resume_dsp(dspstate);
 }
 
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