diff -r -U 3 minecraft\net\minecraft\client\renderer\vertex\VertexFormat.java minecraft_patched\net\minecraft\client\renderer\vertex\VertexFormat.java
--- minecraft\net\minecraft\client\renderer\vertex\VertexFormat.java
+++ minecraft_patched\net\minecraft\client\renderer\vertex\VertexFormat.java
@@ -41,6 +41,7 @@
       this.field_177353_d = 0;
    }
 
+   @SuppressWarnings("incomplete-switch")
    public VertexFormat func_181721_a(VertexFormatElement p_181721_1_) {
       if (p_181721_1_.func_177374_g() && this.func_177341_i()) {
          field_177357_a.warn("VertexFormat error: Trying to add a position VertexFormatElement when one already exists, ignoring.");