libyang MAINTENANCE change format of the empty loops

To improve readability and because of processing by the formatting
tools, add explicit empty block to the empty loops (for, while).
diff --git a/src/path.c b/src/path.c
index 09ccaf6..eb78599 100644
--- a/src/path.c
+++ b/src/path.c
@@ -708,7 +708,7 @@
     assert((target == LY_PATH_TARGET_SINGLE) || (target == LY_PATH_TARGET_MANY));
 
     /* find operation, if we are in any */
-    for (op = ctx_node; op && !(op->nodetype & (LYS_RPC | LYS_ACTION | LYS_NOTIF)); op = op->parent);
+    for (op = ctx_node; op && !(op->nodetype & (LYS_RPC | LYS_ACTION | LYS_NOTIF)); op = op->parent) {}
 
     /* remember original context node */
     cur_node = ctx_node;