[geary] Fix crash when getting preview with long html tags

[Charles Lindsay <clindsay src gnome org>]

commit 6e6df92c0501ec8801487fdaab2ba0334a7d7a80
Author: Simon Lipp <bugs-gnome simon lipp name>
Date:   Mon Mar 17 12:39:08 2014 -0700

    Fix crash when getting preview with long html tags
    
    Closes: bgo #726468

 THANKS                         |    1 +
 src/engine/util/util-html.vala |    5 ++---
 2 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/THANKS b/THANKS
index 5c2228c..8d266e1 100644
--- a/THANKS
+++ b/THANKS
@@ -20,6 +20,7 @@ Mathias Hasselmann <mathias openismus com>
 Timo Kluck <tkluck infty nl>
 Charles Lehner <rdm cel celehner com>
 Avi Levy <avi w levy gmail com>
+Simon Lipp <bugs-gnome simon lipp name>
 Brendan Long <self brendanlong com>
 Angelo Marchesin <marchesin angelo gmail com>
 Kai Mast <mail kai-mast de>
diff --git a/src/engine/util/util-html.vala b/src/engine/util/util-html.vala
index dc0b390..cab2c68 100644
--- a/src/engine/util/util-html.vala
+++ b/src/engine/util/util-html.vala
@@ -124,9 +124,8 @@ public string remove_html_tags(string input) {
         Regex style = new Regex("<style[^>]*?>[\\s\\S]*?<\\/style>", RegexCompileFlags.CASELESS);
         output = style.replace(output, -1, 0, "");
         
-        // Removes remaining tags. Based on this regex:
-        // http://osherove.com/blog/2003/5/13/strip-html-tags-from-a-string-using-regular-expressions.html
-        Regex tags = new Regex("<(.|\n)*?>", RegexCompileFlags.CASELESS);
+        // Removes remaining tags.
+        Regex tags = new Regex("<[^>]*>", RegexCompileFlags.CASELESS);
         return tags.replace(output, -1, 0, "");
     } catch (Error e) {
         debug("Error stripping HTML tags: %s", e.message);