glasm: Optimize EmitVertex into EMIT

src/shader_recompiler/backend/glasm/emit_glasm_not_implemented.cpp

@@ -73,7 +73,11 @@ void EmitEpilogue(EmitContext& ctx) {
 }
 
 void EmitEmitVertex(EmitContext& ctx, ScalarS32 stream) {
-    ctx.Add("EMITS {};", stream);
+    if (stream.type == Type::U32 && stream.imm_u32) {
+        ctx.Add("EMIT;");
+    } else {
+        ctx.Add("EMITS {};", stream);
+    }
 }
 
 void EmitEndPrimitive(EmitContext& ctx, const IR::Value& stream) {