updated for version 7.3.517

Problem:    Crash when using "vipvv". (Alexandre Provencio)
Solution:   Don't let the text length become negative.

src/ops.c

@@ -3042,6 +3042,8 @@ op_yank(oap, deleting, mess)
 			}
 #endif
 		    }
+		    if (endcol == MAXCOL)
+			endcol = (colnr_T)STRLEN(p);
 		    if (startcol > endcol
 #ifdef FEAT_VIRTUALEDIT
 			    || is_oneChar
@@ -3050,8 +3052,6 @@ op_yank(oap, deleting, mess)
 			bd.textlen = 0;
 		    else
 		    {
-			if (endcol == MAXCOL)
-			    endcol = (colnr_T)STRLEN(p);
 			bd.textlen = endcol - startcol + oap->inclusive;
 		    }
 		    bd.textstart = p + startcol;

src/version.c

@@ -714,6 +714,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    517,
 /**/
     516,
 /**/