Fix hedgehog being able to make walk/jump sounds before it was placed
If in hog placement phase you select Skip and then pressed the walk/jump keys, you heard sounds
although the hedgehog is not placed yet.
#ifdef GL_ES
precision mediump float;
#endif
attribute vec2 vertex;
attribute vec4 color;
varying vec4 vcolor;
uniform mat4 mvp;
void main()
{
vec4 p = mvp * vec4(vertex, 0.0, 1.0);
gl_Position = p;
vcolor = color;
}