ffmpeg-3.4.14 "Cantor" does not build anymore (i686-w64-mingw32)

[Carlo Bramini]

After closing issue #10125, I tried to update my package to ffmpeg-3.4.14, which is the last one supporting Windows XP.
The error above is gone, but unfortunately another one happens:

CC      libavformat/adtsenc.o
{standard input}: Assembler messages:
{standard input}:376: Error: operand type mismatch for `shr'
{standard input}:441: Error: operand type mismatch for `shr'
{standard input}:505: Error: operand type mismatch for `shr'
make: *** [/home/carlo/a/mingw64-i686-ffmpeg-3.4.12-1.src/mingw64-i686-ffmpeg-3.4.12-1.noarch/src/ffmpeg-3.4.12/ffbuild/common.mak:60: libavformat/adtsenc.o] Error 1

I saw that this has also been fixen in latest sources, so I created a patch for fixing this error here too.
This patch just mades the same change, by clipping the immediate shift value to 31.
After that, the ffmpeg-3.4.14 "Cantor" can be compiled again.

EDIT: into the "version" field, I selected 3.4.13 because 3.4.14 is missing into the list.

[Carlo Bramini]

Fix for this bug (for reference)

[James]

Fixed in 9983d098ff0ee54bc3b77676dd885883bfbe4ffb