Rev2 urban (fix)

[jsauer-NCAR]

Expected Differences

• Do these changes introduce new tools, command line arguments, or configuration file options? [Yes or No]
  
  If yes, please describe:
  
  No

Pull Request Testing

• Describe testing already performed for these changes:
  
  Fixed compile without URBAN_EXT being defined (the basic "make" form as opposed to make WITH_URBAN=1)
• Recommend testing for the reviewer(s) to perform, including the location of input datasets, and any additional instructions:
  
  None
• Do these changes include sufficient documentation updates, ensuring that no errors or warnings exist in the build of the documentation? [Yes or No]
  Yes
• Do these changes include sufficient testing updates? [Yes or No]
  No
• Will this PR result in changes to the test suite? [Yes or No]
  
  If yes, describe the new output and/or changes to the existing output:
  
  No
• Please complete this pull request review by [Fill in date].
  
  8-6-25

Pull Request Checklist

• Complete the PR definition above.
• Ensure the PR title matches the feature or bugfix branch name.
• Select: Reviewer(s)
• After submitting the PR, select the ⚙️ icon in the Development section of the right hand sidebar. Search for the issue that this PR will close and select it, if it is not already selected.
• After the PR is approved, merge your changes. If permissions do not allow this, request that the reviewer do the merge.
• Close the linked issue and delete your feature or bugfix branch from GitHub.