[Cin] Batchrender update diff

[Andrew Randrianasulu]

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diff -u -w -B  /home/guest/botva/src/cinelerra-git/cin-5/new-git/cinelerra/cinelerra-5.1/cinelerra/batchrender.C batchrender.C  > /home/guest/botva/src/cinelerra-git/cin-5/batchrender_post_merge_raw_fix.diff 

(a lot of options because I wanted  patch without empty lines added)
and hand-editing header.

probably should be applied from within cinelerra-5.1/cinelerra folder.

should fix clonsole rendering
and also fix -r file.xml overwriting in case it was not batchrender.xml
AND should also NOT abort on GUI loading of same project file as
batchrender job file .... (my previous patch introduced new crash because I used exit(1) even when GUI was running ..)
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