dinput: Make ff_effect_direction_to_rad() static.

[Francois Gouget]

Signed-off-by: Francois Gouget <fgouget at free.fr>
---
 dlls/dinput/effect_linuxinput.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/dinput/effect_linuxinput.c b/dlls/dinput/effect_linuxinput.c
index 0e7be2c..ad7d3ad 100644
--- a/dlls/dinput/effect_linuxinput.c
+++ b/dlls/dinput/effect_linuxinput.c
@@ -67,7 +67,7 @@ static inline LinuxInputEffectImpl *impl_from_IDirectInputEffect(IDirectInputEff
     return CONTAINING_RECORD(iface, LinuxInputEffectImpl, IDirectInputEffect_iface);
 }
 
-double ff_effect_direction_to_rad(unsigned int dir)
+static double ff_effect_direction_to_rad(unsigned int dir)
 {
     return (dir & 0xffff) * M_PI / 0x8000;
 }
-- 
2.7.0