libavcodec minor version is > 99 so fix the formating

libavcodec minor version is > 99 so when printing the library versions
the output is a little bit broken:

  libavutil    50. 36. 0 / 50.36. 0
  libavcore     0. 16. 1 /  0.16. 1
  libavcodec   52.108. 0 / 52.108. 0
  libavformat  52. 94. 0 / 52.94. 0
  libavdevice  52.  2. 3 / 52. 2. 3
  libavfilter   1. 74. 0 /  1.74. 0
  libswscale    0. 12. 0 /  0.12. 0

Change the formating to look like this:

  libavutil    50. 36. 0 / 50. 36. 0
  libavcore     0. 16. 1 /  0. 16. 1
  libavcodec   52.108. 0 / 52.108. 0
  libavformat  52. 94. 0 / 52. 94. 0
  libavdevice  52.  2. 3 / 52.  2. 3
  libavfilter   1. 74. 0 /  1. 74. 0
  libswscale    0. 12. 0 /  0. 12. 0
Signed-off-by: Mans Rullgard <mans@mansr.com>

cmdutils.c

@@ -378,7 +378,7 @@ static int warned_cfg = 0;
         const char *indent = flags & INDENT? "  " : "";                 \
         if (flags & SHOW_VERSION) {                                     \
             unsigned int version = libname##_version();                 \
-            fprintf(outstream, "%slib%-10s %2d.%2d.%2d / %2d.%2d.%2d\n", \
+            fprintf(outstream, "%slib%-9s %2d.%3d.%2d / %2d.%3d.%2d\n", \
                     indent, #libname,                                   \
                     LIB##LIBNAME##_VERSION_MAJOR,                       \
                     LIB##LIBNAME##_VERSION_MINOR,                       \