Fix build error

CC      libavdevice/alldevices.o
In file included from ./libavutil/internal.h:167:0,
                 from ./libavutil/common.h:415,
                 from ./libavutil/avutil.h:289,
                 from ./libavutil/log.h:25,
                 from libavdevice/avdevice.h:46,
                 from libavdevice/alldevices.c:22:
./libavutil/libm.h:87:40: error: static declaration of 'fminf' follows non-static declaration
 static av_always_inline av_const float fminf(float x, float y)
                                        ^
make: *** [libavdevice/alldevices.o] Error 1

using buildroot-compiled uClibc toolchain, used defconfig:

BR2_x86_64=y
BR2_x86_corei7=y
BR2_TOOLCHAIN_BUILDROOT_LARGEFILE=y
BR2_TOOLCHAIN_BUILDROOT_INET_IPV6=y
BR2_TOOLCHAIN_BUILDROOT_INET_RPC=y
BR2_TOOLCHAIN_BUILDROOT_WCHAR=y
BR2_TOOLCHAIN_BUILDROOT_CXX=y

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>


diff -uNr ffmpeg-d028c907004e8a3c0f5161ce595331e4cc57c86c.org/libavutil/libm.h ffmpeg-d028c907004e8a3c0f5161ce595331e4cc57c86c/libavutil/libm.h
--- ffmpeg-d028c907004e8a3c0f5161ce595331e4cc57c86c.org/libavutil/libm.h	2014-07-16 20:37:20.000000000 +0200
+++ ffmpeg-d028c907004e8a3c0f5161ce595331e4cc57c86c/libavutil/libm.h	2014-07-17 22:58:01.781316442 +0200
@@ -82,16 +82,6 @@
 #define exp2f(x) ((float)exp2(x))
 #endif /* HAVE_EXP2F */
 
-#if !HAVE_FMINF
-#undef fminf
-static av_always_inline av_const float fminf(float x, float y)
-{
-    //Note, the NaN special case is needed for C spec compliance, it should be
-    //optimized away if the users compiler is configured to assume no NaN
-    return x > y ? y : (x == x ? x : y);
-}
-#endif
-
 #if !HAVE_ISINF
 static av_always_inline av_const int isinf(float x)
 {