libstagefright: Use aligned width and height.

Bug: 19014147
Change-Id: I33314b02448e436c43fcfad086b5edfa650dcf83
diff --git a/media/libstagefright/codecs/m4v_h263/dec/src/pvdec_api.cpp b/media/libstagefright/codecs/m4v_h263/dec/src/pvdec_api.cpp
index b783222..90d7c6b 100644
--- a/media/libstagefright/codecs/m4v_h263/dec/src/pvdec_api.cpp
+++ b/media/libstagefright/codecs/m4v_h263/dec/src/pvdec_api.cpp
@@ -292,8 +292,10 @@
 
     if (video->shortVideoHeader == PV_TRUE)
     {
-        video->displayWidth = video->width = width;
-        video->displayHeight = video->height = height;
+        video->displayWidth = width;
+        video->displayHeight = height;
+        video->width = (width + 15) & -16;
+        video->height = (height + 15) & -16;
 
         video->nMBPerRow =
             video->nMBinGOB  = video->width / MB_SIZE;