Visit genexp if conditions during scoping analysis

src/analysis/scoping_analysis.cpp

@@ -407,6 +407,8 @@ public:
             for (AST_comprehension* c : node->generators) {
                 if (!first)
                     c->iter->accept(this);
+                for (auto i : c->ifs)
+                    i->accept(this);
                 c->target->accept(this);
                 first = false;
             }

test/tests/genexps.py

@@ -15,3 +15,10 @@ def f2():
     print list(g2)
 f2()
 
+# Make sure that the 'ifs' part gets scoped properly
+def f3():
+    b = True
+    print list(x for x in range(5) if b)
+    print list(x for x in range(5) if [b for b in xrange(4)])
+    print b
+print f3()