[babl] meson: for issue #41 clean up cflags varials

[Øyvind "pippin" Kolås <ok src gnome org>]

commit 8556048ecee1fc663a4759e3937a580cfffa7345
Author: Øyvind Kolås <pippin gimp org>
Date:   Fri Aug 2 16:34:28 2019 +0200

    meson: for issue #41 clean up cflags varials

 meson.build | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)
---
diff --git a/meson.build b/meson.build
index d46c12e..36be08e 100644
--- a/meson.build
+++ b/meson.build
@@ -174,11 +174,12 @@ add_project_arguments(common_c_flags, language: 'c')
 ################################################################################
 # Check for compiler CPU extensions
 
-mmx_args = []
-sse_args = []
-sse2_cflags = []
+# intialize these to nothing, so meson doesn't complain on non-x86
+
+sse2_cflags   = []
+f16c_cflags   = []
 sse4_1_cflags = []
-avx2_cflags = []
+avx2_cflags   = []
 
 # mmx assembly
 if cc.has_argument('-mmmx') and get_option('enable-mmx')