gtk.cfg: Added support for g_strdup(); wxwidgets.cfg: Added <use-retval/>-flag to wxString::FromUTF8().

cfg/gtk.cfg

@@ -18084,6 +18084,16 @@
     <leak-ignore/>
     <noreturn>false</noreturn>
   </function>
+  <!-- gchar * g_strdup (const gchar *str);-->
+  <function name="g_strdup">
+    <noreturn>false</noreturn>
+    <returnValue type="gchar *"/>
+    <arg nr="1">
+      <not-null/>
+      <not-uninit/>
+      <not-bool/>
+    </arg>
+  </function>
   <define name="gchar" value="char"/>
   <define name="guchar" value="unsigned char"/>
   <define name="gint" value="int"/>

cfg/wxwidgets.cfg

@@ -7298,6 +7298,7 @@
     <noreturn>false</noreturn>
     <returnValue type="wxString"/>
     <pure/>
+    <use-retval/>
     <arg nr="1">
       <!-- <not-uninit/> Avoid FP for (*) -->
       <not-null/>