avcodec/libx265: fix else clause when zeroing reordered_opaque

CC	libavcodec/libx265.o
libavcodec/libx265.c: In function ‘libx265_encode_frame’:
libavcodec/libx265.c:781:5: warning: this ‘else’ clause does not guard... [-Wmisleading-indentation]
     else
     ^~~~
libavcodec/libx265.c:782:1: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘else’
 FF_DISABLE_DEPRECATION_WARNINGS
 ^~~

Signed-off-by: Marton Balint <cus@passwd.hu>

libavcodec/libx265.c

@@ -778,10 +778,11 @@ FF_ENABLE_DEPRECATION_WARNINGS
         rd_release(ctx, idx);
     }
 #if FF_API_REORDERED_OPAQUE
-    else
+    else {
 FF_DISABLE_DEPRECATION_WARNINGS
         avctx->reordered_opaque = 0;
 FF_ENABLE_DEPRECATION_WARNINGS
+    }
 #endif
 
     *got_packet = 1;