vim-patch:7.4.1847

Problem:    Getting an item from a NULL dict crashes.  Setting a register to a
            NULL list crashes. (Nikolai Pavlov, issue vim/vim#768)  Comparing a NULL
            dict with a NULL dict fails.
Solution:   Properly check for NULL.

13ddc5c359

src/nvim/version.c

@@ -593,7 +593,7 @@ static int included_patches[] = {
   // 1850 NA
   // 1849 NA
   // 1848 NA
-  // 1847,
+  1847,
   // 1846 NA
   // 1845 NA
   // 1844 NA