typo fix

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@2855 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

src/files.c

@@ -147,7 +147,7 @@ void initialize_buffer(void)
 
     memset(&openfile->originalfilestat, 0, sizeof(struct stat));
 #endif
-#ifndef ENABLE_COLOR
+#ifdef ENABLE_COLOR
     openfile->colorstrings = NULL;
 #endif
 }