Fix crosshair drawing not clearing color

The renderer color is set to health color when drawing crosshair. After
drawing the crosshair, the renderer color was not cleared and could affect
other things. With cg_draw3dicons 0 and cg_drawCrosshairNames 0 it affected
the attacker icon.

code/cgame/cg_draw.c

@@ -1899,6 +1899,8 @@ static void CG_DrawCrosshair(void)
 	trap_R_DrawStretchPic( x + cg.refdef.x + 0.5 * (cg.refdef.width - w), 
 		y + cg.refdef.y + 0.5 * (cg.refdef.height - h), 
 		w, h, 0, 0, 1, 1, hShader );
+
+	trap_R_SetColor( NULL );
 }
 
 /*