Fixed if_ruby.c for compilation without Ruby.framework

Author: splhack

src/if_ruby.c

@@ -113,13 +113,13 @@
 #  define rb_gc_writebarrier_unprotect_promoted rb_gc_writebarrier_unprotect_promoted_stub
 # endif
 
-#ifdef FEAT_GUI_MACVIM
+#ifdef RUBY_FRAMEWORK
 # include <Ruby/ruby.h>
 #else
 # include <ruby.h>
 #endif
 #ifdef RUBY19_OR_LATER
-# ifdef FEAT_GUI_MACVIM
+# ifdef RUBY_FRAMEWORK
 #  include <Ruby/ruby/encoding.h>
 # else
 #  include <ruby/encoding.h>