avi fps fixed

Originally committed as revision 1649 to svn://svn.ffmpeg.org/ffmpeg/trunk

tests/ffmpeg.regression.ref

 ffmpeg regression test
 dda0ba041aef50a5101884291c06d4d9 *./data/a-mpeg1.mpg
 6713259d72260740bbddaea30631ea18 *./data/out.yuv
-fd7ce31fc722dccac93beea5b90ef0b0 *./data/a-msmpeg4v2.avi
+8730846cd73f07689bfab061eac3e800 *./data/a-msmpeg4v2.avi
 2cfc9307a2fd9651cf9c8e42dea1a80e *./data/out.yuv
-e573c2022c1a84ad56c131296de3eed3 *./data/a-msmpeg4.avi
+8b2a7f5e105784d65426989e4fce6e94 *./data/a-msmpeg4.avi
 8786aa956838234fe3e48d0ef8cbd46c *./data/out.yuv
-3f3771cacabde5393aa6788e10352407 *./data/a-wmv1.avi
+a0bec32a81f9a4cd174557a49cd26430 *./data/a-wmv1.avi
 7261e23fd8ad1de6efee022051b936be *./data/out.yuv
-8596e23c3f300cd42eb66750ac9d37af *./data/a-h263.avi
+82822fc90059bc16a3ec159019b38b18 *./data/a-h263.avi
 545df74e0aa443499600faedd10a7065 *./data/out.yuv
-40998ec1c608b516b041b8c0e2a50990 *./data/a-h263p.avi
+c92f9396cce0978caf6b5e7074a5812d *./data/a-h263p.avi
 668ba3cb87859ca4d9a4269bad47b3f5 *./data/out.yuv
-cbb3e7118b48671c686d046e7c1ae4b0 *./data/a-odivx.avi
+d625bba8e06bed36d201657cf9503bd0 *./data/a-odivx.avi
 98bb113f0fa0d61fd3b0b1699ac6c69a *./data/out.yuv
-301a256487aa79ad4b683bda07a99ab9 *./data/a-mpeg4-rc.avi
+9e1358a14c690c50ac98f3fd8ec4b75f *./data/a-mpeg4-rc.avi
 580000bfe2d4359d9aa9a9415f953b3b *./data/out.yuv
-7e040fda2b7696fea348a21b54eec1be *./data/a-mpeg4-adv.avi
+6ef12f847b9a2a53c06ab05d69f0d255 *./data/a-mpeg4-adv.avi
 4c5e8754506ff2c53649541e4fcd2438 *./data/out.yuv
 3c65a1bc6866649e666286c825bd5b96 *./data/a-mpeg1b.mpg
 da8e21c7b78b7a25558dc319524b91d8 *./data/out.yuv
-5bcc6fd4b7dde27c74c633c761f0e5b1 *./data/a-mjpeg.avi
+f0625ff59a53b5dd5b04307ac9318acf *./data/a-mjpeg.avi
 f23a9e50a559e174766ee808c48fea22 *./data/out.yuv
 4b37703d3dc03873f99603165c0fe11e *./data/a-rv10.rm
 255469fef47bee94cfb2e3385ebb736b *./data/out.yuv