HWC: Use proper typecast to avoid scaling issues

Multiplying double with integer may scale up/down original value.

Change-Id: I2aa002a434d287df69d34de7e4fea3d56bcfbfaa
diff --git a/libhwcomposer/hwc_utils.cpp b/libhwcomposer/hwc_utils.cpp
index b8b7740..146730a 100644
--- a/libhwcomposer/hwc_utils.cpp
+++ b/libhwcomposer/hwc_utils.cpp
@@ -1061,10 +1061,10 @@
     }
 
     calc_cut(leftCutRatio, topCutRatio, rightCutRatio, bottomCutRatio, orient);
-    crop_l += crop_w * leftCutRatio;
-    crop_t += crop_h * topCutRatio;
-    crop_r -= crop_w * rightCutRatio;
-    crop_b -= crop_h * bottomCutRatio;
+    crop_l += (int)round((double)crop_w * leftCutRatio);
+    crop_t += (int)round((double)crop_h * topCutRatio);
+    crop_r -= (int)round((double)crop_w * rightCutRatio);
+    crop_b -= (int)round((double)crop_h * bottomCutRatio);
 }
 
 bool areLayersIntersecting(const hwc_layer_1_t* layer1,