Git Repository Merge Request #28: term/post.trm: unbreak !HAVE_DEFLATE_ENCODER builds (merged)

Commit 2f2cf617808 (post: handle RGBA images (only current use is to render
a pixmap)) added an extra '}' outside the HAVE_DEFLATE_ENCODER (gd support)
conditional, leading to build breakage:

In file included from term.h:298,
                 from term.c:1211:
../term/post.trm:4016:11: error: expected declaration specifiers or '...' before string constant
 4016 |     fputs("%%%%BeginImage\n", gppsfile);

http://autobuild.buildroot.net/results/5676609b6331b645f2e557aca67afe4c3a087433/build-end.log

Fix it by dropping the extra { } added by the above commit.

[Ethan Merritt]

Applied to 6.0rc3 and 6.1 also