Fix for bug #805860 Second assertion Assertion `n > 0 && n < SINUSES_CALCULATED*2+1' in get_n_sincos.
        Just typo-style mistake. Should be '||' instead of '&&'.

per-file comments:
  mysql-test/r/gis-precise.result
Fix for bug #805860 Second assertion Assertion `n > 0 && n < SINUSES_CALCULATED*2+1' in get_n_sincos.
        test result updated.
  mysql-test/t/gis-precise.test
Fix for bug #805860 Second assertion Assertion `n > 0 && n < SINUSES_CALCULATED*2+1' in get_n_sincos.
        test case added.
  sql/item_geofunc.cc
Fix for bug #805860 Second assertion Assertion `n > 0 && n < SINUSES_CALCULATED*2+1' in get_n_sincos.
        condition fixed.