fixed mistake in quaternion normalize

diff --git a/vg_m.h b/vg_m.h
index 0ded4e127302bfd0d396f14416c12710eeb3fb84..8b354d697f442b03d4c943aac878c11b7829ef36 100644 (file)
--- a/vg_m.h
+++ b/vg_m.h
@@ -628,11 +628,11 @@ static inline void q_inv( v4f q, v4f d )
    d[3] =  q[3]*s;
 }
 
-static inline void q_nlerp( v4f a, v4f b, f32 t, v4f d )
-{
+static inline void q_nlerp( v4f a, v4f b, f32 t, v4f d ){
    if( v4_dot(a,b) < 0.0f ){
-      v4_muls( b, -1.0f, d );
-      v4_lerp( a, d, t, d );
+      v4f c;
+      v4_muls( b, -1.0f, c );
+      v4_lerp( a, c, t, d );
    }
    else
       v4_lerp( a, b, t, d );