glsl: Make the symbol table's add_function just use the function's name.
diff --git a/src/glsl/linker.cpp b/src/glsl/linker.cpp
index 616ec78..7aa9406 100644
--- a/src/glsl/linker.cpp
+++ b/src/glsl/linker.cpp
@@ -546,7 +546,7 @@
       ir_function *func;
 
       if ((func = inst->as_function()) != NULL) {
-	 sh->symbols->add_function(func->name, func);
+	 sh->symbols->add_function(func);
       } else if ((var = inst->as_variable()) != NULL) {
 	 sh->symbols->add_variable(var->name, var);
       }