swag does not generate spec for struct fields defined in comma separated syntax

[that-ambuj]

Describe the bug
When fields of a struct that have the same type are defined as comma separated,
swag ignores the fields except the first one.

To Reproduce

1. Define a Go struct with the following syntax

   type Point struct {
     SRID int
     X, Y float64 // Notice these are on the same line and this is a valid syntax
   }

2. Generate the spec for this struct.
3. Get a struct that has the Y field missing.
   

Expected behavior
Expected the generated swagger model/schema to have the missing y field

Screenshots
If applicable, add screenshots to help explain your problem.

Your swag version
1.16.3

Your go version
1.22.5

Desktop (please complete the following information):

• OS: Debian 12 in WSL
• Browser: Firefox
• Version: N/A

Additional context
The type I'm using is imported from another package, so I can't really fix the type definition in Go without making a huge PR.