[tracker] libtracker-fts: Clarify code flow

[Carlos Garnacho <carlosg src gnome org>]

commit 7e4078b5cdf1f41f064eb8d7b154f0ed802940b6
Author: Carlos Garnacho <carlosg gnome org>
Date:   Fri Jan 27 13:25:33 2017 +0100

    libtracker-fts: Clarify code flow
    
    The xInst function pointer can't return a <0 column here, so in practical
    effects an offsets array is ensured to be created on the first iteration.
    It might not seem like that to the keen eye, nor Coverity.
    
    Coverity ID: 1388715

 src/libtracker-fts/tracker-fts-tokenizer.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/src/libtracker-fts/tracker-fts-tokenizer.c b/src/libtracker-fts/tracker-fts-tokenizer.c
index f6c05ed..44bb762 100644
--- a/src/libtracker-fts/tracker-fts-tokenizer.c
+++ b/src/libtracker-fts/tracker-fts-tokenizer.c
@@ -207,6 +207,7 @@ tracker_offsets_function (const Fts5ExtensionApi  *api,
        GArray *offsets = NULL;
        const gchar * const *property_names;
        gint cur_col = -1;
+       gboolean first = TRUE;
 
        if (n_args > 0) {
                sqlite3_result_error (ctx, "Invalid argument count", -1);
@@ -228,7 +229,7 @@ tracker_offsets_function (const Fts5ExtensionApi  *api,
 
                rc = api->xInst (fts_ctx, i, &phrase, &col, &n_token);
 
-               if (cur_col != col) {
+               if (first || cur_col != col) {
                        const char *text;
                        int length;
 
@@ -242,6 +243,8 @@ tracker_offsets_function (const Fts5ExtensionApi  *api,
                        cur_col = col;
                }
 
+               first = FALSE;
+
                if (str->len != 0)
                        g_string_append_c (str, ',');