(find_defun_start): Move test for

open_paren_in_column_0_is_defun_start outside of the loop.

src/syntax.c

@@ -374,6 +374,8 @@ find_defun_start (pos, pos_byte)
      syntax-tables.  */
   gl_state.current_syntax_table = current_buffer->syntax_table;
   gl_state.use_global = 0;
+  if (open_paren_in_column_0_is_defun_start)
+    {
       while (PT > BEGV)
 	{
 	  /* Open-paren at start of line means we may have found our
@@ -381,8 +383,7 @@ find_defun_start (pos, pos_byte)
 	  if (SYNTAX (FETCH_CHAR (PT_BYTE)) == Sopen)
 	    {
 	      SETUP_SYNTAX_TABLE (PT + 1, -1);	/* Try again... */
-	  if (SYNTAX (FETCH_CHAR (PT_BYTE)) == Sopen
-	      && open_paren_in_column_0_is_defun_start)
+	      if (SYNTAX (FETCH_CHAR (PT_BYTE)) == Sopen)
 		break;
 	      /* Now fallback to the default value.  */
 	      gl_state.current_syntax_table = current_buffer->syntax_table;
@@ -391,6 +392,7 @@ find_defun_start (pos, pos_byte)
 	  /* Move to beg of previous line.  */
 	  scan_newline (PT, PT_BYTE, BEGV, BEGV_BYTE, -2, 1);
 	}
+    }
 
   /* Record what we found, for the next try.  */
   find_start_value = PT;