avutil: make intfloat api public

The functions are already av_ prefixed and intfloat header is already provided.
Install libavutil/intfloat.h
Signed-off-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Anton Khirnov <anton@khirnov.net>

doc/APIchanges

@@ -13,6 +13,10 @@ libavutil:   2011-04-18
 
 API changes, most recent first:
 
+2012-01-30 - xxxxxxx - lavu 51.22.0 - intfloat.h
+  Add a new installed header libavutil/intfloat.h with int/float punning
+  functions.
+
 2012-01-25 - lavf 53.22.0
   f1caf01 Allow doing av_write_frame(ctx, NULL) for flushing possible
           buffered data within a muxer. Added AVFMT_ALLOW_FLUSH for

libavutil/Makefile

@@ -17,6 +17,7 @@ HEADERS = adler32.h                                                     \
           fifo.h                                                        \
           file.h                                                        \
           imgutils.h                                                    \
+          intfloat.h                                                    \
           intfloat_readwrite.h                                          \
           intreadwrite.h                                                \
           lfg.h                                                         \

libavutil/avutil.h

@@ -154,7 +154,7 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR 51
-#define LIBAVUTIL_VERSION_MINOR 21
+#define LIBAVUTIL_VERSION_MINOR 22
 #define LIBAVUTIL_VERSION_MICRO  0
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \