Fix compile command conditionals

[baodrate]

• (( fpath[(i)$f:a:h] )) always evaluates to true. Fix this conditional to use the I subscript flag instead of i
• Add the e subscript flag to avoid the file paths being interpreted as patterns
• The ${(k)functions_source[(r)$f:a]} == $f:t conditional only checks if the first function found. Since an autoloaded zsh script can define multiple functions, this fixes the conditional to check all functions defined by that source file.
  • This check might be entirely unnecessary because any autoloaded functions should be in $fpath. And the fpath conditional is more semantically consistent in any case

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