Handle messy index files

Signed-off-by: Matt Farina <matt.farina@suse.com>
(cherry picked from commit 69efc0d4fb)

pkg/repo/index.go

@@ -357,6 +357,7 @@ func loadIndex(data []byte, source string) (*IndexFile, error) {
 		for idx := len(cvs) - 1; idx >= 0; idx-- {
 			if cvs[idx] == nil {
 				log.Printf("skipping loading invalid entry for chart %q from %s: empty entry", name, source)
+				cvs = append(cvs[:idx], cvs[idx+1:]...)
 				continue
 			}
 			// When metadata section missing, initialize with no data

pkg/repo/index_test.go

@@ -68,6 +68,7 @@ entries:
   grafana:
   - apiVersion: v2
     name: grafana
+  - null
   foo:
   -
   bar: