updated for version 7.3.522

Problem:    Crash in vim_realloc() when using MEM_PROFILE.
Solution:   Avoid using a NULL argument. (Dominique Pelle)

src/eval.c

@@ -14643,7 +14643,9 @@ f_readfile(argvars, rettv)
 		    long growmin  = (long)((p - start) * 2 + prevlen);
 		    prevsize = grow50pc > growmin ? grow50pc : growmin;
 		}
-		if ((newprev = vim_realloc(prev, prevsize)) == NULL)
+		newprev = prev == NULL ? alloc(prevsize)
+						: vim_realloc(prev, prevsize);
+		if (newprev == NULL)
 		{
 		    do_outofmem_msg((long_u)prevsize);
 		    failed = TRUE;

src/version.c

@@ -714,6 +714,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    522,
 /**/
     521,
 /**/