fix: prevent npe by handling checking error in NewAnalysis call (#1365)

If there is an issue in creating the Analysis config when calling
analysis.NewAnalysis, then we want to check before assigning the context to a
potentially nil pointer.

Signed-off-by: Danny Clark <danielclark@google.com>
Co-authored-by: Alex Jones <alexsimonjones@gmail.com>

pkg/server/analyze/analyze.go

@@ -34,10 +34,10 @@ func (h *Handler) Analyze(ctx context.Context, i *schemav1.AnalyzeRequest) (
 		[]string{}, //TODO: add custom http headers in server mode
 		false,      // with stats disable
 	)
-	config.Context = ctx // Replace context for correct timeouts.
 	if err != nil {
 		return &schemav1.AnalyzeResponse{}, err
 	}
+	config.Context = ctx // Replace context for correct timeouts.
 	defer config.Close()
 
 	if config.CustomAnalyzersAreAvailable() {