Add missing operation.

Bug 27227050

Change-Id: Id8b6357f25888801dec9bbedc5855faa58def62d
Reviewed-on: https://swiftshader-review.googlesource.com/4920
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Daniel Toyama <kenjitoyama@google.com>
diff --git a/src/OpenGL/compiler/OutputASM.cpp b/src/OpenGL/compiler/OutputASM.cpp
index a632bde..e14d6a5 100644
--- a/src/OpenGL/compiler/OutputASM.cpp
+++ b/src/OpenGL/compiler/OutputASM.cpp
@@ -1089,9 +1089,10 @@
 

 		switch(node->getOp())

 		{

-		case EOpSequence:           break;

-		case EOpDeclaration:        break;

-		case EOpPrototype:          break;

+		case EOpSequence:             break;

+		case EOpDeclaration:          break;

+		case EOpInvariantDeclaration: break;

+		case EOpPrototype:            break;

 		case EOpComma:

 			if(visit == PostVisit)

 			{