fix potential segfault when doing a full justify

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@2156 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

ChangeLog

@@ -62,6 +62,10 @@ CVS code -
   do_justify()
 	- For consistency, preserve placewewant if we didn't unjustify
 	  instead of setting it to 0. (DLR)
+	- When justifying the entire file, properly break out of the
+	  loop if there are no more paragraphs after the current one and
+	  the paragraph search left us on the magicline, so as to avoid
+	  a segfault. (DLR)
 - winio.c:
   unget_kbinput()
 	- Remove the wide character handling, as it didn't work properly

src/nano.c

@@ -2771,15 +2771,15 @@ void do_justify(bool full_justify)
 	/* Find the first line of the paragraph to be justified.  That
 	 * is the start of this paragraph if we're in one, or the start
 	 * of the next otherwise.  Save the quote length and paragraph
-	 * length (number of lines).  Don't refresh the screen yet
-	 * (since we'll do that after we justify).  If the search failed
-	 * and we're justifying the whole file, move the last line of
-	 * the text we're justifying to just before the magicline, which
-	 * is where it'll be anyway if we've searched the entire file,
-	 * and break out of the loop; otherwise, refresh the screen and
+	 * length (number of lines).  Don't refresh the screen yet,
+	 * since we'll do that after we justify.  If the search
+	 * failed, we're justifying the whole file, and the search
+	 * didn't leave us on the last line of the file, set the last
+	 * line of the text to be justified to the last line of the file
+	 * and break out of the loop.  Otherwise, refresh the screen and
 	 * get out. */
 	if (do_para_search(&quote_len, &par_len)) {
-	    if (full_justify) {
+	    if (full_justify && current != filebot) {
 		last_par_line = filebot;
 		break;
 	    } else {