E121 when it is OK

:64: E121 Excess whitespace before '('

```
Private Declare Function CryptEnumProvidersA Lib "advapi32.dll" (ByVal dwIndex As Long, ByVal pdwReserved As Long, ByVal dwFlags As Long, ByRef pdwProvType As Long, ByVal pszProvName As String, ByRef pcbProvName As Long) As Long
```

double check that the syntax is valid before fixing.

Start with the E121 rule and the handling of the shown VBA declaration. Verify whether the declaration syntax is valid before changing the whitespace check. Done means valid declarations no longer report E121 while invalid excess whitespace cases continue to be detected.

Written by the indexing model from the issue text.