Fixes #860: Avoid invalid time transformation

layouts/v7/modules/Vtiger/dashboards/HistoryContents.tpl

@@ -114,7 +114,7 @@
 							</div>
 						{/if}
 					</div>
-					<p class="pull-right muted" style="padding-right:10px;"><small title="{Vtiger_Util_Helper::formatDateTimeIntoDayString("$TIME")}">{Vtiger_Util_Helper::formatDateDiffInStrings("$TIME")}</small></p>
+					{if $TIME}<p class="pull-right muted" style="padding-right:10px;"><small title="{Vtiger_Util_Helper::formatDateTimeIntoDayString("$TIME")}">{Vtiger_Util_Helper::formatDateDiffInStrings("$TIME")}</small></p>{/if}
 				</div>
 			{/if}
 			{else if $MODELNAME == 'ModComments_Record_Model'}
@@ -153,4 +153,4 @@
 			{/if}
 		</span>
 	{/if}
-</div>
\ No newline at end of file
+</div>