vim-patch:7.4.606 #2594

Problem:    May crash when using a small window.
Solution:   Avoid dividing by zero. (Christian Brabandt)

https://github.com/vim/vim/commit/v7-4-606

src/nvim/normal.c

@@ -3399,6 +3399,10 @@ static bool nv_screengo(oparg_T *oap, int dir, long dist)
   width1 = curwin->w_width - col_off1;
   width2 = curwin->w_width - col_off2;
 
+  if (width2 == 0) {
+    width2 = 1;  // Avoid divide by zero.
+  }
+
   if (curwin->w_width != 0) {
     /*
      * Instead of sticking at the last character of the buffer line we

src/nvim/version.c

@@ -177,7 +177,7 @@ static int included_patches[] = {
   //609,
   //608,
   //607,
-  //606,
+  606,
   //605,
   //604,
   //603,