clock.c: introduce clock().

This simplifies calls to clock_10ms() a bit and saves 18 bytes
binary size.

clock.c

@@ -65,7 +65,7 @@ void clock_250ms() {
 
 /*! do stuff every 10 milliseconds
 
-	call from ifclock(CLOCK_FLAG_10MS) in busy loops
+	called from clock(), do not call directly
 */
 void clock_10ms() {
 	// reset watchdog
@@ -78,3 +78,14 @@ void clock_10ms() {
 	}
 }
 
+/*! do reoccuring stuff
+
+	call it occasionally in busy loops
+*/
+void clock() {
+	ifclock(clock_flag_10ms) {
+		clock_10ms();
+	}
+}
+
+

clock.h

@@ -3,5 +3,6 @@
 
 void clock_250ms(void);
 void clock_10ms(void);
+void clock(void);
 
 #endif	/* _CLOCK_H */

dda_queue.c

@@ -198,9 +198,6 @@ void queue_flush() {
 
 /// wait for queue to empty
 void queue_wait() {
-	for (;queue_empty() == 0;) {
-		ifclock(clock_flag_10ms) {
-			clock_10ms();
-		}
-	}
+	while (queue_empty() == 0)
+		clock();
 }

gcode_process.c

@@ -155,9 +155,7 @@ void process_gcode_command() {
 				// delay
 				if (next_target.seen_P) {
 					for (;next_target.P > 0;next_target.P--) {
-						ifclock(clock_flag_10ms) {
-							clock_10ms();
-						}
+						clock();
 						delay_ms(1);
 					}
 				}

mendel.c

@@ -323,8 +323,6 @@ int main (void)
 			gcode_parse_char(c);
 		}
 
-		ifclock(clock_flag_10ms) {
-			clock_10ms();
-		}
+		clock();
 	}
 }