Return bad exit code when we fail to generate an update.

generate_delta_main.cc

Index: generate_delta_main.cc
diff --git a/generate_delta_main.cc b/generate_delta_main.cc
index 0f791e0b509dfb6cbbb16ead976e394df4789fdc..1a7a98ef37d6794af8092bf6a6fbc0afd6942db9 100644
--- a/generate_delta_main.cc
+++ b/generate_delta_main.cc
@@ -186,16 +186,18 @@ int Main(int argc, char** argv) {
       LOG(FATAL) << "old_dir or new_dir not directory";
     }
   }
-  DeltaDiffGenerator::GenerateDeltaUpdateFile(FLAGS_old_dir,
+  if (DeltaDiffGenerator::GenerateDeltaUpdateFile(FLAGS_old_dir,
                                               FLAGS_old_image,
                                               FLAGS_new_dir,
                                               FLAGS_new_image,
                                               FLAGS_old_kernel,
                                               FLAGS_new_kernel,
                                               FLAGS_out_file,
-                                              FLAGS_private_key);
-
-  return 0;
+                                              FLAGS_private_key)) {
+    return 0;
+  } else {

[petkov, 2011/02/09 00:38:10]

Prefer getting rid of the else...

+    return 1;
+  }
 }
 
 }  // namespace {}