ir_constant_expression: Initialize op[0] and op[1] to NULL.
This makes it easy to check if there is a second argument.
diff --git a/src/glsl/ir_constant_expression.cpp b/src/glsl/ir_constant_expression.cpp
index 1b81017..6d6ee09 100644
--- a/src/glsl/ir_constant_expression.cpp
+++ b/src/glsl/ir_constant_expression.cpp
@@ -129,7 +129,7 @@
ir_constant_visitor::visit(ir_expression *ir)
{
value = NULL;
- ir_constant *op[2];
+ ir_constant *op[2] = { NULL, NULL };
unsigned int operand, c;
ir_constant_data data;