speller: don't proceed when the user aborts the searching

When searching for a misspelled word takes a while, and the user
stops this search with ^C, then abort the spelling-checking session.
Signed-off-by: Benno Schulenberg <bensberg@justemail.net>

src/text.c

@@ -2359,7 +2359,7 @@ bool do_int_spell_fix(const char *word)
     filestruct *edittop_save = openfile->edittop;
     filestruct *current_save = openfile->current;
 	/* Save where we are. */
-    bool proceed = TRUE;
+    bool proceed = FALSE;
 	/* The return value of this function. */
     bool result;
 	/* The return value of searching for a misspelled word. */