Makefile.defs: versions set to 4.3.0-dev4

Makefile.defs

@@ -97,7 +97,7 @@ INSTALL_FLAVOUR=$(FLAVOUR)
 VERSION = 4
 PATCHLEVEL = 3
 SUBLEVEL =  0
-EXTRAVERSION = -dev3
+EXTRAVERSION = -dev4
 
 # memory manager switcher
 # 0 - f_malloc (fast malloc)