HWC field was renamed

Change-Id: If08258776db427c45d9ba70cfa79f4d290398ca6
diff --git a/hwc/hwc.c b/hwc/hwc.c
index 25085b7..74012dd 100644
--- a/hwc/hwc.c
+++ b/hwc/hwc.c
@@ -1194,9 +1194,9 @@
     unsigned int i, j;
     for (i = 0; i < numDisplays; i++) {
         hwc_display_contents_1_t* list = displays[i];
-        if (list->flipFenceFd >= 0) {
-            ALOGW("flipFenceFd[%u] was %d", i, list->flipFenceFd);
-            list->flipFenceFd = -1;
+        if (list->retireFenceFd >= 0) {
+            ALOGW("retireFenceFd[%u] was %d", i, list->retireFenceFd);
+            list->retireFenceFd = -1;
         }
 
         for (j = 0; j < list->numHwLayers; j++) {