Don't add null entries to variable values

This triggered a bug now that function parameters are processed within
the function's scope.

diff --git a/source/glsl/optimize.cpp b/source/glsl/optimize.cpp
index 1f5b5d317c720993b91f2dbc5dd8fb880417cd7c..fcb1075ecbadc6a1d412142dc8191a83587ff917 100644 (file)
--- a/source/glsl/optimize.cpp
+++ b/source/glsl/optimize.cpp
@@ -160,7 +160,7 @@ void ConstantConditionEliminator::visit(Assignment &assign)
 
 void ConstantConditionEliminator::visit(VariableDeclaration &var)
 {
-       if(var.constant || current_block->parent)
+       if((var.constant || current_block->parent) && var.init_expression)
                variable_values[&var] = var.init_expression.get();
 }