[FFmpeg-cvslog] configure: add -Wstrict-prototypes when available

[Ganesh Ajjanagadde]

ffmpeg | branch: master | Ganesh Ajjanagadde <gajjanagadde at gmail.com> | Thu Oct 22 14:37:31 2015 -0400| [e6a93e59adeea1c140f2ef63e4055a15823bfeda] | committer: Ganesh Ajjanagadde

configure: add -Wstrict-prototypes when available

GCC (and Clang) have this useful warning that is not enabled by -Wall or
-Wextra. This will ensure that issues like those fixed in
4da52e3630343e8d3a79aef2cafcb6bf0b71e8da
will trigger warnings.

Reviewed-by: Hendrik Leppkes <h.leppkes at gmail.com>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=e6a93e59adeea1c140f2ef63e4055a15823bfeda
---

 configure |    1 +
 1 file changed, 1 insertion(+)

diff --git a/configure b/configure
index a38b290..276ec30 100755
--- a/configure
+++ b/configure
@@ -5637,6 +5637,7 @@ disabled iconv || check_func_headers iconv.h iconv || check_lib2 iconv.h iconv -
 enabled debug && add_cflags -g"$debuglevel" && add_asflags -g"$debuglevel"
 
 # add some useful compiler flags if supported
+check_cflags -Wstrict-prototypes
 check_cflags -Wdeclaration-after-statement
 check_cflags -Wall
 check_cflags -Wdisabled-optimization