Check rc instead of parsing for errors. This now catches the case where the…

Check rc instead of parsing for errors.  This now catches the case where the remote branch has been deleted and you're still trying to pull against it.

library/git

@@ -155,7 +155,7 @@ def pull(module, repo, dest, version):
         if b.startswith('* '):
             cur_branch = b
     if is_local_branch(module, dest, version) and not is_current_branch(module, dest, version):
-        (out, err) = switch_version(module, dest, remote, version)
+        (rc, out, err) = switch_version(module, dest, remote, version)
 
     cmd = "git pull -u origin"
     cmd = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
@@ -219,9 +219,11 @@ def main():
         if rc != 0:
             module.fail_json(msg=err)
         (rc, out, err) = pull(module, repo, dest, version)
+        if rc != 0:
+            module.fail_json(msg=err)
 
     # handle errors from clone or pull
-    if out.find('error') != -1 or err.find('ERROR') != -1:
+    if rc != 0:
         module.fail_json(msg=err)
 
     # switch to version specified regardless of whether