vim-patch:7.4.1909 (#5748)

Problem:    Doubled semicolons.
Solution:   Reduce to one. (Dominique Pelle)

945ec093cd

src/nvim/main.c

@@ -1763,7 +1763,7 @@ static int process_env(char *env, bool is_viminit)
     do_cmdline_cmd((char *)initstr);
     sourcing_name = save_sourcing_name;
     sourcing_lnum = save_sourcing_lnum;
-    current_SID = save_sid;;
+    current_SID = save_sid;
     return OK;
   }
   return FAIL;