Makefile.defs: version set to 4.1.0-dev0

- master branch is open for adding new features to be part of v4.1.x

Makefile.defs

@@ -160,9 +160,9 @@ INSTALL_FLAVOUR=$(FLAVOUR)
 
 #version number
 VERSION = 4
-PATCHLEVEL = 0
+PATCHLEVEL = 1
 SUBLEVEL =  0
-EXTRAVERSION = -pre2
+EXTRAVERSION = -dev0
 
 # memory manager switcher
 # 0 - f_malloc (fast malloc)