Minor changes to avoid infinite loops inside companion9x

src/gruvin9x.cpp

@@ -480,7 +480,11 @@ inline uint8_t keyDown()
 
 void clearKeyEvents()
 {
-    while(keyDown());  // loop until all keys are up
+#ifdef SIMU
+    while (keyDown() && main_thread_running);
+#else
+    while (keyDown());  // loop until all keys are up
+#endif
     putEvent(0);
 }
 
@@ -512,7 +516,9 @@ void doSplash()
       uint16_t tgtime = get_tmr10ms() + SPLASH_TIMEOUT;  //2sec splash screen
       while(tgtime != get_tmr10ms())
       {
-#ifndef SIMU
+#ifdef SIMU
+        if (!main_thread_running) return;
+#else
         getADC_filt();
 #endif
         uint16_t tsum = 0;
@@ -606,6 +612,10 @@ void checkSwitches()
   //loop until all switches are reset
   while (1)
   {
+#ifdef SIMU
+    if (!main_thread_running) return;
+#endif
+
     uint8_t i;
     for(i=SW_BASE; i<SW_Trainer; i++)
     {
@@ -645,6 +655,9 @@ void alert(const prog_char * s, bool defaults)
   clearKeyEvents();
   while(1)
   {
+#ifdef SIMU
+    if (!main_thread_running) return;
+#endif
     if(keyDown())   return;  //wait for key release
 
     if(getSwitch(g_eeGeneral.lightSw,0) || g_eeGeneral.lightAutoOff || defaults)