Crashes on enum with full comment

[starius]

/**
 * Comment
 */
typedef enum foo {
    bar = 1
} foo;

int main() {
}

Problematic piece of AST:

|-EnumDecl 0x5fd8be673708 <1.c:4:9, line:6:1> line:4:14 foo
| |-FullComment 0x5fd8be673ae0 <line:2:3, col:10>
| | `-ParagraphComment 0x5fd8be673ab0 <col:3, col:10>
| |   `-TextComment 0x5fd8be673a80 <col:3, col:10> Text=" Comment"
| `-EnumConstantDecl 0x5fd8be6737e0 <line:5:5, col:11> col:5 bar 'int'
|   `-IntegerLiteral 0x5fd8be6737c0 <col:11> 'int' 1

Error:

panic: interface conversion: ast.Node is *ast.FullComment, not *ast.EnumConstantDecl

goroutine 1 [running]:
github.com/elliotchance/c2go/transpiler.transpileEnumDecl(0xc4200fe000, 0xc4200da500, 0xc420043490, 0xc4200fe000, 0x6dd920, 0xc4200da500, 0x0)
	c2go/transpiler/enum.go:222 +0x20d8
github.com/elliotchance/c2go/transpiler.transpileToNode(0x6dd920, 0xc4200da500, 0xc4200fe000, 0x0, 0x0, 0x0, 0x0, 0x0)
	c2go/transpiler/transpiler.go:487 +0x1fc

Fix:

diff --git a/transpiler/enum.go b/transpiler/enum.go
index 800182a..f812445 100644
--- a/transpiler/enum.go
+++ b/transpiler/enum.go
@@ -219,7 +219,11 @@ func transpileEnumDecl(p *program.Program, n *ast.EnumDecl) (decls []goast.Decl,
        // counter for replace iota
        var counter int
        for i, c := range n.Children() {
-               e, newPre, newPost := transpileEnumConstantDecl(p, c.(*ast.EnumConstantDecl))
+               cd, ok := c.(*ast.EnumConstantDecl)
+               if !ok {
+                       continue
+               }
+               e, newPre, newPost := transpileEnumConstantDecl(p, cd)
                preStmts, postStmts = combinePreAndPostStmts(preStmts, postStmts, newPre, newPost)
 
                e.Names[0].Obj = goast.NewObj(goast.Con, e.Names[0].Name)

[elliotchance]

Thanks for raising this @starius. It look like @Konstantin8105 already has a fix for this 👍