avr_firmware: timer: squash compiler warnings

avr_firmware/src/timer.c

@@ -82,26 +82,31 @@ char timerInit()
 
 unsigned timerGetTicks()
 {
+	unsigned ret;
 	ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
-		return timerTicks;
+	        ret = timerTicks;
 	}
+	return ret;
 }
 
 unsigned timerGetSeconds()
 {
+	unsigned ret;
 	ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
-		return timerSeconds>>1;
+	        ret = timerSeconds>>1;
 	}
+	return ret;
 }
 
 char getKey(char *key)
 {
+	char ret;
         ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
 		if (keyAction != KEY_NONE)
 			*key = keyNum;
 
-		char ret = keyAction;
+	        ret = keyAction;
 		keyAction = KEY_NONE;
-		return ret;
 	}
+	return ret;
 }