patch 8.1.0948: when built without +eval "Vim --clean" produces errors

Problem:    When built without +eval "Vim --clean" produces errors. (James
            McCoy)
Solution:   Do not enable filetype detection.

Author: brammool

runtime/defaults.vim

@@ -1,7 +1,7 @@
 " The default vimrc file.
 "
 " Maintainer:	Bram Moolenaar <[email protected]>
-" Last change:	2019 Jan 26
+" Last change:	2019 Feb 18
 "
 " This is loaded if no vimrc file was found.
 " Except when Vim is run with "-u NONE" or "-C".
@@ -90,28 +90,33 @@ if &t_Co > 2 || has("gui_running")
   let c_comment_strings=1
 endif
 
-" Enable file type detection.
-" Use the default filetype settings, so that mail gets 'tw' set to 72,
-" 'cindent' is on in C files, etc.
-" Also load indent files, to automatically do language-dependent indenting.
-" Revert with ":filetype off".
-filetype plugin indent on
-
-" Put these in an autocmd group, so that you can revert them with:
-" ":augroup vimStartup | au! | augroup END"
-augroup vimStartup
-  au!
-
-  " When editing a file, always jump to the last known cursor position.
-  " Don't do it when the position is invalid, when inside an event handler
-  " (happens when dropping a file on gvim) and for a commit message (it's
-  " likely a different one than last time).
-  autocmd BufReadPost *
-    \ if line("'\"") >= 1 && line("'\"") <= line("$") && &ft !~# 'commit'
-    \ |   exe "normal! g`\""
-    \ | endif
-
-augroup END
+" Only do this part when Vim was compiled with the +eval feature.
+if 1
+
+  " Enable file type detection.
+  " Use the default filetype settings, so that mail gets 'tw' set to 72,
+  " 'cindent' is on in C files, etc.
+  " Also load indent files, to automatically do language-dependent indenting.
+  " Revert with ":filetype off".
+  filetype plugin indent on
+
+  " Put these in an autocmd group, so that you can revert them with:
+  " ":augroup vimStartup | au! | augroup END"
+  augroup vimStartup
+    au!
+
+    " When editing a file, always jump to the last known cursor position.
+    " Don't do it when the position is invalid, when inside an event handler
+    " (happens when dropping a file on gvim) and for a commit message (it's
+    " likely a different one than last time).
+    autocmd BufReadPost *
+      \ if line("'\"") >= 1 && line("'\"") <= line("$") && &ft !~# 'commit'
+      \ |   exe "normal! g`\""
+      \ | endif
+
+  augroup END
+
+endif
 
 " Convenient command to see the difference between the current buffer and the
 " file it was loaded from, thus the changes you made.

src/version.c

@@ -779,6 +779,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    948,
 /**/
     947,
 /**/