[gnome-code-assistance] [backends/go] Work around AST bug

[Jesse van den Kieboom <jessevdk src gnome org>]

commit cb7c53de337b9c472bb6eaec0a68625e4c9df0b9
Author: Jesse van den Kieboom <jessevdk gmail com>
Date:   Mon Nov 11 14:56:27 2013 +0100

    [backends/go] Work around AST bug

 .../p/go.tools/go/types/resolver.go                |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/backends/go/deps/src/code.google.com/p/go.tools/go/types/resolver.go 
b/backends/go/deps/src/code.google.com/p/go.tools/go/types/resolver.go
index a260bd0..5ffbb61 100644
--- a/backends/go/deps/src/code.google.com/p/go.tools/go/types/resolver.go
+++ b/backends/go/deps/src/code.google.com/p/go.tools/go/types/resolver.go
@@ -162,6 +162,9 @@ func (check *checker) resolveFiles(files []*ast.File) {
                                        case *ast.ImportSpec:
                                                // import package
                                                var imp *Package
+                                               if s.Path == nil {
+                                                       continue
+                                               }
                                                path, _ := strconv.Unquote(s.Path.Value)
                                                if path == "C" && check.conf.FakeImportC {
                                                        // TODO(gri) shouldn't create a new one each time