Prepare for 7.3b release.  Fix src/Makefile enabling python3 by default.
diff --git a/src/Makefile b/src/Makefile
index f912093..a8991bc 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -409,7 +409,7 @@
 # If both python2.x and python3.x are enabled then the linking will be via
 # dlopen(), dlsym(), dlclose(), i.e. pythonX.Y.so must be available
 #CONF_OPT_PYTHON = --enable-pythoninterp
-CONF_OPT_PYTHON3 = --enable-python3interp
+#CONF_OPT_PYTHON3 = --enable-python3interp
 
 # RUBY
 # Uncomment this when you want to include the Ruby interface.
@@ -3024,11 +3024,11 @@
 objects/if_python.o: if_python.c vim.h auto/config.h feature.h os_unix.h \
  auto/osdef.h ascii.h keymap.h term.h macros.h option.h structs.h \
  regexp.h gui.h gui_beval.h proto/gui_beval.pro ex_cmds.h proto.h \
- globals.h farsi.h arabic.h
+ globals.h farsi.h arabic.h if_py_both.h
 objects/if_python3.o: if_python3.c vim.h auto/config.h feature.h os_unix.h \
  auto/osdef.h ascii.h keymap.h term.h macros.h option.h structs.h \
  regexp.h gui.h gui_beval.h proto/gui_beval.pro ex_cmds.h proto.h \
- globals.h farsi.h arabic.h
+ globals.h farsi.h arabic.h if_py_both.h
 objects/if_tcl.o: if_tcl.c vim.h auto/config.h feature.h os_unix.h auto/osdef.h \
  ascii.h keymap.h term.h macros.h option.h structs.h regexp.h gui.h \
  gui_beval.h proto/gui_beval.pro ex_cmds.h proto.h globals.h farsi.h \