[libgtop] It's been 26 years since C89, let modern compilers do what they want.

[Benoît Dejean <bdejean src gnome org>]

commit 5ee8d4cb58a6a3f41aa2a83a517fe5beca208fa9
Author: Benoit Dejean <bdejean gmail com>
Date:   Sat Jul 18 15:56:42 2015 +0200

    It's been 26 years since C89, let modern compilers do what they
    want.

 configure.ac |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index a675cf8..f5013c5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -317,7 +317,6 @@ if test "$GCC" = "yes" ; then
         CFLAGS="\
        -Winline \
        -Wall \
-       -std=gnu89 \
        -Wchar-subscripts -Wmissing-declarations -Wmissing-prototypes \
        -Wnested-externs -Wpointer-arith \
        -Wcast-align -Wsign-compare \