cosmetics

fix some indent/whitespace, remove a few duplicate includes, extra
semi-colons

Change-Id: If937182b40a21e0f2028496e7b4b06c6e8a41352

src/enc/frame.c

@@ -508,7 +508,7 @@ static void StoreSideInfo(const VP8EncIterator* const it) {
       }
       case 7: *info = mb->alpha_; break;
       default: *info = 0; break;
-    };
+    }
   }
 #if SEGMENT_VISU  // visualize segments and prediction modes
   SetBlock(it->yuv_out_ + Y_OFF, mb->segment_ * 64, 16);