Added handle_t type to server interface so that we can make handles
pointers later on.
Always use 0 to signal invalid handle in server requests.

diff --git a/loader/elf.c b/loader/elf.c
index 9303a9a..47b1128 100644
--- a/loader/elf.c
+++ b/loader/elf.c
@@ -164,7 +164,7 @@
 
 	SNOOP_RegisterDLL(hmod,libname,STUBSIZE/sizeof(ELF_STDCALL_STUB));
 
-        wm = PE_CreateModule( hmod, libname, 0, -1, FALSE );
+        wm = PE_CreateModule( hmod, libname, 0, 0, FALSE );
         wm->find_export = ELF_FindExportedFunction;
 	wm->dlhandle = dlhandle;
 	return wm;