display: Remove klockwork warnings and errors.

Remove all klockwork warnings and errors for libgralloc,
libhwcomposer, liboverlay, libqdutils, libqservice, libvirtual,
libexternal libraries to avoid buffer overflow and memory leaks.

Change-Id: I078143bcbcf5e4b342156bd8305a644566f7cc4b
diff --git a/libhwcomposer/hwc_utils.cpp b/libhwcomposer/hwc_utils.cpp
index d94e0e9..e7ead9b 100644
--- a/libhwcomposer/hwc_utils.cpp
+++ b/libhwcomposer/hwc_utils.cpp
@@ -486,7 +486,7 @@
     // the position based on the new width and height
     if ((extOrientation & HWC_TRANSFORM_ROT_90) &&
                         isOrientationPortrait(ctx)) {
-        hwc_rect_t r;
+        hwc_rect_t r = {0, 0, 0, 0};
         //Calculate the position
         xRatio = (outPos.x - xPos)/width;
         // GetaspectRatio -- tricky to get the correct aspect ratio
@@ -1227,25 +1227,30 @@
     for(uint32_t i = 0; i < ctx->mLayerRotMap[dpy]->getCount(); i++) {
         int rotFd = ctx->mRotMgr->getRotDevFd();
         int rotReleaseFd = -1;
+        overlay::Rotator* currRot = ctx->mLayerRotMap[dpy]->getRot(i);
+        hwc_layer_1_t* currLayer = ctx->mLayerRotMap[dpy]->getLayer(i);
+        if((currRot == NULL) || (currLayer == NULL)) {
+            continue;
+        }
         struct mdp_buf_sync rotData;
         memset(&rotData, 0, sizeof(rotData));
         rotData.acq_fen_fd =
-                &ctx->mLayerRotMap[dpy]->getLayer(i)->acquireFenceFd;
+                &currLayer->acquireFenceFd;
         rotData.rel_fen_fd = &rotReleaseFd; //driver to populate this
-        rotData.session_id = ctx->mLayerRotMap[dpy]->getRot(i)->getSessId();
+        rotData.session_id = currRot->getSessId();
         int ret = 0;
         ret = ioctl(rotFd, MSMFB_BUFFER_SYNC, &rotData);
         if(ret < 0) {
             ALOGE("%s: ioctl MSMFB_BUFFER_SYNC failed for rot sync, err=%s",
                     __FUNCTION__, strerror(errno));
         } else {
-            close(ctx->mLayerRotMap[dpy]->getLayer(i)->acquireFenceFd);
+            close(currLayer->acquireFenceFd);
             //For MDP to wait on.
-            ctx->mLayerRotMap[dpy]->getLayer(i)->acquireFenceFd =
+            currLayer->acquireFenceFd =
                     dup(rotReleaseFd);
             //A buffer is free to be used by producer as soon as its copied to
             //rotator
-            ctx->mLayerRotMap[dpy]->getLayer(i)->releaseFenceFd =
+            currLayer->releaseFenceFd =
                     rotReleaseFd;
         }
     }