Teacup reprap firmware patch: update temp_residency each 10ms instead of 250ms (when using INTERCOM).

temp.c.patch

diff -Naur a/temp.c b/temp.c
--- a/temp.c	2011-05-09 23:19:05.386655497 +0600
+++ b/temp.c	2011-05-09 23:37:36.316164309 +0600
@@ -271,8 +271,9 @@
 					break;
 			}
 			temp_sensors_runtime[i].last_read_temp = temp;
+		}
 
-			if (labs((int16_t)(temp - temp_sensors_runtime[i].target_temp)) < (TEMP_HYSTERESIS*4)) {
+			if (labs((int16_t)(temp_sensors_runtime[i].last_read_temp - temp_sensors_runtime[i].target_temp)) < (TEMP_HYSTERESIS*4)) {
 				if (temp_sensors_runtime[i].temp_residency < (TEMP_RESIDENCY_TIME*100))
 					temp_sensors_runtime[i].temp_residency++;
 			}
@@ -283,7 +284,6 @@
 			if (temp_sensors[i].heater < NUM_HEATERS) {
 				heater_tick(temp_sensors[i].heater, i, temp_sensors_runtime[i].last_read_temp, temp_sensors_runtime[i].target_temp);
 			}
-		}
 	}
 }