dispatcher: fix compiler warning #612

> CC (gcc) [M dispatcher.so]      dispatch.o
> dispatch.c: In function 'ds_set_attrs':
> dispatch.c:263:8: warning: 'tmp_rweight' may be used uninitialized in this function [-Wmaybe-uninitialized]
>     int tmp_rweight;
>         ^
> make[3]: 'libkmi.so.1.0' is up to date.

modules/dispatcher/dispatch.c

@@ -225,6 +225,7 @@ int ds_set_attrs(ds_dest_t *dest, str *attrs)
 	param_hooks_t phooks;
 	param_t *pit=NULL;
 	str param;
+	int tmp_rweight = 0;
 
 	if(attrs==NULL || attrs->len<=0)
 		return 0;
@@ -260,7 +261,7 @@ int ds_set_attrs(ds_dest_t *dest, str *attrs)
 			dest->attrs.socket = pit->body;
 		}else if(pit->name.len==7
 				&& strncasecmp(pit->name.s, "rweight", 7)==0) {
-			int tmp_rweight;
+			tmp_rweight = 0;
 			str2sint(&pit->body, &tmp_rweight);
 			if ( tmp_rweight>=1 && tmp_rweight<=100 ) {
 				dest->attrs.rweight = tmp_rweight;