Problem: Not using internal diff if 'diffopt' is not changed.
Solution: Correct initialization of diff_flags. (Christian Brabandt)
#define DIFF_VERTICAL 16 // vertical splits
#define DIFF_HIDDEN_OFF 32 // diffoff when hidden
#define DIFF_INTERNAL 64 // use internal xdiff algorithm
-static int diff_flags = DIFF_FILLER;
+static int diff_flags = DIFF_INTERNAL | DIFF_FILLER;
static long diff_algorithm = 0;
static int included_patches[] =
{ /* Add new patch number below this line */
+/**/
+ 370,
/**/
369,
/**/