shithub: vdiff

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fix relative path plumbing (thanks qwx)

--- a/vdiff.c

+++ b/vdiff.c

@@ -265,8 +265,11 @@

 			ab = 1;

 		if(l->t == Lfile && l->s[0] == '+'){

 			f = l->s+4;

-			if(ab && strncmp(f, "b/", 2)==0)

+			if(ab && strncmp(f, "b/", 2)==0){

 				f += 1;

+				if(access(f, AEXIST) < 0)

+					f += 1;

+			}

 			t = strchr(f, '\t');

 			if(t!=nil)

 				*t = 0;