Initialize array size on error.

The array size is set using the value returned by arraySizeErrorCheck,
even when an error occurred, so don't leave it uninitialized.

Bug chromium:801648

Change-Id: If2af27c5f61dca2931796f1681dce61ab6a44341
Reviewed-on: https://swiftshader-review.googlesource.com/18368
Tested-by: Nicolas Capens <nicolascapens@google.com>
Reviewed-by: Alexis Hétu <sugoi@google.com>

src/OpenGL/compiler/ParseHelper.cpp

diff --git a/src/OpenGL/compiler/ParseHelper.cpp b/src/OpenGL/compiler/ParseHelper.cpp
index c7100ba..6d4b149 100644
--- a/src/OpenGL/compiler/ParseHelper.cpp
+++ b/src/OpenGL/compiler/ParseHelper.cpp
@@ -802,6 +802,7 @@
 	if (expr->getQualifier() != EvqConstExpr || constant == 0 || !constant->isScalarInt())
 	{
 		error(line, "array size must be a constant integer expression", "");
+		size = 1;
 		return true;
 	}
 
@@ -1485,7 +1486,7 @@
 
 	TType arrayType(publicType);
 
-	int size;
+	int size = 0;
 	if(arraySizeErrorCheck(identifierLocation, indexExpression, size))
 	{
 		recover();
@@ -1666,7 +1667,7 @@
 	else
 	{
 		TType arrayType = TType(publicType);
-		int size;
+		int size = 0;
 		if(arraySizeErrorCheck(arrayLocation, indexExpression, size))
 		{
 			recover();