better transitions overspeed bugfix

when the user wants less than 42 fps, respect this limit during transitions.

wled00/FX_fcn.cpp

@@ -1932,7 +1932,9 @@ void WS2812FX::service() {
 
         if (frameDelay < speedLimit) frameDelay = FRAMETIME;                    // WLEDMM limit effects that want to go faster than target FPS
         if (seg.mode != FX_MODE_HALLOWEEN_EYES) seg.call++;
-        if (seg.transitional && frameDelay > FRAMETIME_FIXED) frameDelay = FRAMETIME_FIXED; // force faster updates during transition // WLEDMM only if effect requested very slow updates
+
+        if (seg.transitional && frameDelay > max(int(FRAMETIME), int(FRAMETIME_FIXED))) 
+          frameDelay = max(int(FRAMETIME), int(FRAMETIME_FIXED)); // force faster updates during transition // WLEDMM only if effect requested very slow updates
 
         seg.lastBri = seg.currentBri(seg.on ? seg.opacity:0);                   // WLEDMM remember for next time
         seg.handleTransition();