doc/developer.rst: add missing return type to code style sample

a9467513 · Max Kellermann · 17d944f6 · a9467513
Commit a9467513 authored Dec 10, 2023 by Max Kellermann
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--- a/doc/developer.rst
+++ b/doc/developer.rst
@@ -20,6 +20,7 @@ Some example code:

 .. code-block:: c

+    int
    Foo(const char *abc, int xyz)
    {
        if (abc == nullptr) {