integration fix: remove compilation warning (not sure -1 is the correct value)

common/config/config_userapi.c

@@ -153,5 +153,5 @@ int config_isparamset(paramdef_t *params,int paramidx)
 }
 
 int config_getparamval_fromparamdefidx(paramdef_t *cfgoptions,int paramidx) {
-    
+    return -1;
 }