oggdec writes RIFF header even in raw mode

A break statement is missing after the 'o' case when parsing the command line
options, thus causing the raw flag to get messed up when "-R something"
preceedes "-o somefile". This also applies to the long options.

Here's the trivial fix in context diff format:

*** oggdec.c.orig       2002-12-05 15:39:43.000000000 +0100
--- oggdec.c    2002-12-05 15:57:43.000000000 +0100
***************
*** 99,104 ****
--- 99,105 ----
                  break;
              case 'o':
                  outfilename = strdup(optarg);
+                               break;
              case 'R':
                  raw = atoi(optarg);
                  break;