[geary] Prevent messages from setting a broken body height. Fixes Bug 750075.

[Michael Gratton <mjog src gnome org>]

commit fdde9b15a1befe64a61900b1aee5f33f7989919c
Author: Michael James Gratton <mike vee net>
Date:   Wed Feb 8 00:30:48 2017 +1100

    Prevent messages from setting a broken body height. Fixes Bug 750075.
    
    * ui/conversation-web-view.css: Require body height to remain set to
      CSS's default value.

 ui/conversation-web-view.css |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/ui/conversation-web-view.css b/ui/conversation-web-view.css
index 1382c93..b366b58 100644
--- a/ui/conversation-web-view.css
+++ b/ui/conversation-web-view.css
@@ -33,6 +33,9 @@ body {
 
   /* XXX for plain text only? */
   overflow-wrap: break-word !important;
+
+  /* Fix messages with broken body style. See Bug 750075. */
+  height: auto !important;
 }
 
 table {