hwc: Fix compiler warning

Fix compiler warning messages due to narrowed conversions.

Change-Id: Ifa770683fa9af7d5280c9117520276e04100302c
diff --git a/libhwcomposer/hwc.cpp b/libhwcomposer/hwc.cpp
index 237cd39..53355df 100644
--- a/libhwcomposer/hwc.cpp
+++ b/libhwcomposer/hwc.cpp
@@ -605,17 +605,17 @@
         }
 
         int lSplit = getLeftSplit(ctx, dpy);
-        qhwc::ovutils::Dim lRoi = qhwc::ovutils::Dim {
+        qhwc::ovutils::Dim lRoi = qhwc::ovutils::Dim(
             ctx->listStats[dpy].lRoi.left,
             ctx->listStats[dpy].lRoi.top,
             ctx->listStats[dpy].lRoi.right - ctx->listStats[dpy].lRoi.left,
-            ctx->listStats[dpy].lRoi.bottom - ctx->listStats[dpy].lRoi.top };
+            ctx->listStats[dpy].lRoi.bottom - ctx->listStats[dpy].lRoi.top);
 
-        qhwc::ovutils::Dim rRoi = qhwc::ovutils::Dim {
+        qhwc::ovutils::Dim rRoi = qhwc::ovutils::Dim(
             ctx->listStats[dpy].rRoi.left - lSplit,
             ctx->listStats[dpy].rRoi.top,
             ctx->listStats[dpy].rRoi.right - ctx->listStats[dpy].rRoi.left,
-            ctx->listStats[dpy].rRoi.bottom - ctx->listStats[dpy].rRoi.top };
+            ctx->listStats[dpy].rRoi.bottom - ctx->listStats[dpy].rRoi.top);
 
         if(!Overlay::displayCommit(ctx->dpyAttr[dpy].fd, lRoi, rRoi)) {
             ALOGE("%s: display commit fail for %d dpy!", __FUNCTION__, dpy);