Don't crash if groupedStats missing (ie inspectReport mode)

pyglance/glance/variablereport.txt

@@ -117,18 +117,20 @@ Copyright (c) 2011 University of Wisconsin SSEC. All rights reserved.
     
     ## list out all of the statistics groups we have
 	<table>
-    % for setName in sorted(list(groupedStats)) :
-        <% dataSet = groupedStats[setName] %>
-            <tr><th class="l">${setName}</th><th>Both</th><th>File A</th><th>File B</th></tr>
-                % for statName, statValue in sorted(list(dataSet.items())) :
-                    <tr>
-                        <td class="n">${statName}<%block name="statDocLink"><a href="${runInfo[constants.DOCUMENTATION_PATH_KEY]}">*</a>:</%block></td>
-                        <td class="n">${report.make_formatted_display_string(statValue['both'])}</td>
-                        <td class="n">${report.make_formatted_display_string(statValue['a'])}</td>
-                        <td class="n">${report.make_formatted_display_string(statValue['b'])}</td>
-                    </tr>
-                % endfor
-    % endfor
+	% if groupedStats is not UNDEFINED:
+		% for setName in sorted(list(groupedStats)) :
+			<% dataSet = groupedStats[setName] %>
+				<tr><th class="l">${setName}</th><th>Both</th><th>File A</th><th>File B</th></tr>
+					% for statName, statValue in sorted(list(dataSet.items())) :
+						<tr>
+							<td class="n">${statName}<%block name="statDocLink"><a href="${runInfo[constants.DOCUMENTATION_PATH_KEY]}">*</a>:</%block></td>
+							<td class="n">${report.make_formatted_display_string(statValue['both'])}</td>
+							<td class="n">${report.make_formatted_display_string(statValue['a'])}</td>
+							<td class="n">${report.make_formatted_display_string(statValue['b'])}</td>
+						</tr>
+					% endfor
+		% endfor
+	% endif
 	</table>
     
     </%block>