master [FIX]: fix file search command in root Makefile

Makefile

@@ -16,8 +16,8 @@ COMPILEOPT=--pause
 all:
 
 # collect files to be maintained
-EDITFILES=$(filter-out src contrib %.bak,$(wildcard *) \
-                             $(shell find src -type f -maxdepth 1) \
+EDITFILES=$(filter-out flist src contrib %.bak,$(wildcard *) \
+                             $(shell find src -maxdepth 1 -type f) \
                              $(shell find contrib -type f))
 
 flist: Makefile $(EDITFILES)