[Kst] Proposed fix for bug 117817 (Only the first parameter is shown in fit labels)

[Barth Netterfield]

if we plugin->update(-1); before we plugin->createFitScalars();, then the 
outputVector["Parameters"] will be up to date, and the label will work.

The down side is that we will get an extra update out of it.  I think it is 
worth it!

Index: kstfitdialog_i.cpp
===================================================================
--- kstfitdialog_i.cpp  (revision 502364)
+++ kstfitdialog_i.cpp  (working copy)
@@ -154,12 +154,13 @@
     arg(plugin->plugin()->data()._readableName);

   if (plugin->outputVectors().contains("Parameters")) {
+    plugin->update(-1);
     plugin->createFitScalars();
     int i = 0;
     int length = (plugin->outputVectors())["Parameters"]->length();
     QString strParamName;
     for (strParamName = plugin->plugin()->parameterName(0);
-        !strParamName.isEmpty() && i < length;
+         !strParamName.isEmpty() && i < length;
          strParamName = plugin->plugin()->parameterName(++i)) {
       if (plugin->outputScalars().contains(strParamName)) {
         KstScalarPtr scalar = plugin->outputScalars()[strParamName];