Fix vec3:sub in vanilla lua;
@@ -512,7 +512,7 @@ static int l_lovrVec3Sub(lua_State* L) {
vec3 v = luax_checkvector(L, 1, V_VEC3, NULL);
if (lua_type(L, 2) == LUA_TNUMBER) {
float x = lua_tonumber(L, 2);
- v[0] -= x, v[1] += x, v[2] -= x, v[3] -= x;
+ v[0] -= x, v[1] -= x, v[2] -= x, v[3] -= x;
} else {
vec3 u = luax_checkvector(L, 2, V_VEC3, "vec3 or number");
vec3_sub(v, u);
