doc/examples: fix assignments in if()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
aacenc: Fix assignments in if()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
libfaac: Fix assignments in if()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
libfdk-aacenc: Fix assignments in if()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
libmp3lame: Fix assignments in if()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
libopencore-amr: Fix assignments in if()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
libspeexenc: Fix assignments in if()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
libvo-aacenc: Fix assignments in if()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
libvorbisenc: Fix assignments in if()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
nellymoserenc: Fix assignments in if()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
ra144enc: Fix assignments in if()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
svq1enc: Fix assignments in if()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
tiff: Fix assignments in if()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
vsrc_testsrc: Fix assignments in if()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
lavf/mux: Fix assignments in if()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
rtmpproto: Fix assignments in if()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>