patch 7.4.1073
Problem:    Alloc_id depends on numbers, may use the same one twice.  It's not
            clear from the number what it's for.
Solution:   Use an enum.  Add a function to lookup the enum value from the
            name.
diff --git a/src/vim.h b/src/vim.h
index 1a176be..fd0b0b0 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -1765,6 +1765,8 @@
 
 #include "structs.h"	    /* file that defines many structures */
 
+#include "alloc.h"
+
 /* Values for "do_profiling". */
 #define PROF_NONE	0	/* profiling not started */
 #define PROF_YES	1	/* profiling busy */