compilation warning: declaration of 'rewind' shadows a global declaration

[rdiez]

This compilation warning should be removed:

./pulsecore/memblockq.h:158: warning: declaration of 'rewind' shadows a global declaration

This is what causes the warning:

void pa_memblockq_set_maxrewind(pa_memblockq *memblockq, size_t rewind);

Proposed fix: rename "rewind" parameter to "maxrewind" (this matches this parameter's name in the counterpart function definition in memblockq.c)

[lennart]

Fixed a while back in git.