reject odd widths or heights for YV12 format

Change-Id: I66cbb5fbc20630218947cd41552a95503b58e15e
diff --git a/libgralloc-qsd8k/gpu.cpp b/libgralloc-qsd8k/gpu.cpp
index d577f96..90ff445 100644
--- a/libgralloc-qsd8k/gpu.cpp
+++ b/libgralloc-qsd8k/gpu.cpp
@@ -239,8 +239,12 @@
             break;
 
         case HAL_PIXEL_FORMAT_YV12:
+            if ((w&1) || (h&1)) {
+                LOGE("w or h is odd for HAL_PIXEL_FORMAT_YV12");
+                return -EINVAL;
+            }
             alignedw = ALIGN(w, 16);
-            alignedh = ALIGN(h,  2);
+            alignedh = h;
             size = alignedw*alignedh +
                     (ALIGN(alignedw/2, 16) * (alignedh/2))*2;
             break;