windows.cfg: Added support for _putenv() and _wputenv().

cfg/windows.cfg

@@ -5437,6 +5437,17 @@ HFONT CreateFont(
     <noreturn>false</noreturn>
     <returnValue type="void"/>
   </function>
+  <!-- int _putenv(const char *envstring);  -->
+  <!-- int _wputenv(const wchar_t *envstring);  -->
+  <function name="_putenv,_wputenv,_tputenv">
+    <returnValue type="int"/>
+    <noreturn>false</noreturn>
+    <arg nr="1">
+      <not-null/>
+      <not-uninit/>
+      <not-bool/>
+    </arg>
+  </function>
   <podtype name="LARGE_INTEGER" sign="s" size="8"/>
   <podtype name="POINTER_SIGNED" sign="s"/>
   <podtype name="POINTER_UNSIGNED" sign="u"/>