Try to supply a prototype for the module init function but avoid

Windows "inconsistent linkage" warnings at the same time.  I agree
with Mark Hammond that the whole DL_IMPORT/DL_EXPORT macro system
needs an overhaul; this is just an expedient hack until then.

Modules/parsermodule.c

@@ -2846,7 +2846,7 @@ static PyMethodDef parser_functions[] =  {
     };
 
 
-DL_IMPORT(void) initparser(void);
+DL_EXPORT(void) initparser(void);  /* supply a prototype */
 
 DL_EXPORT(void)
 initparser(void)

Modules/pyexpat.c

@@ -854,7 +854,7 @@ static char pyexpat_module_documentation[] =
 
 /* Initialization function for the module */
 
-DL_IMPORT(void) initpyexpat(void);
+DL_EXPORT(void) initpyexpat(void);  /* supply a prototype */
 
 DL_EXPORT(void)
 initpyexpat(void)