psp/SDL_sysjoystick.c: fix -Wshadow warnings.
diff --git a/src/joystick/psp/SDL_sysjoystick.c b/src/joystick/psp/SDL_sysjoystick.c
index a3b9bc5..2dfa8aa 100644
--- a/src/joystick/psp/SDL_sysjoystick.c
+++ b/src/joystick/psp/SDL_sysjoystick.c
@@ -63,10 +63,10 @@ static point c = { 78, 32767 };
static point d = { 128, 32767 };
/* simple linear interpolation between two points */
-static SDL_INLINE void lerp (point *dest, point *a, point *b, float t)
+static SDL_INLINE void lerp (point *dest, point *pt_a, point *pt_b, float t)
{
- dest->x = a->x + (b->x - a->x)*t;
- dest->y = a->y + (b->y - a->y)*t;
+ dest->x = pt_a->x + (pt_b->x - pt_a->x)*t;
+ dest->y = pt_a->y + (pt_b->y - pt_a->y)*t;
}
/* evaluate a point on a bezier-curve. t goes from 0 to 1.0 */