[vala/0.40] ccode: Add void to delegate typedef declarations without parameters

[Rico Tzschichholz <ricotz src gnome org>]

commit fe027f82ad65598ce119cc5667abcc242345daa8
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Mon Nov 19 18:22:20 2018 +0100

    ccode: Add void to delegate typedef declarations without parameters
    
    Found with -Werror=strict-prototypes

 ccode/valaccodefunctiondeclarator.vala | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/ccode/valaccodefunctiondeclarator.vala b/ccode/valaccodefunctiondeclarator.vala
index 30f0c63b1..c67b9d840 100644
--- a/ccode/valaccodefunctiondeclarator.vala
+++ b/ccode/valaccodefunctiondeclarator.vala
@@ -74,6 +74,9 @@ public class Vala.CCodeFunctionDeclarator : CCodeDeclarator {
                        }
                        i++;
                }
+               if (i == 0) {
+                       writer.write_string ("void");
+               }
                
                writer.write_string (")");