Running Inkscape 1.0

On subsequent calls we should know which inkscape version we have when this is not the case we already tried to determine it, but it failed so we should bail out here without error as an error has already been given.

src/formula.cpp

@@ -383,10 +383,18 @@ void FormulaManager::generateImages(const char *path,Format format,HighDPI hd) c
           {
             sprintf(args,"-l form_%d.svg -z %s_tmp.pdf 2>%s",pageNum,formBase.data(),Portable::devNull());
           }
-          else
+          else if (inkscapeVersion == 1)
           {
             sprintf(args,"--export-type=svg --export-filename=form_%d.svg %s_tmp.pdf 2>%s",pageNum,formBase.data(),Portable::devNull());
           }
+          else
+          {
+            // on subsequent calls we should know which inkscape version we have
+            // when this is not the case we already tried to determine it, but it failed 
+            // so we should bail out here without error as an error has already been given.
+            QDir::setCurrent(oldDir);
+            return;
+          }
           Portable::sysTimerStart();
           if (Portable::system("inkscape",args)!=0)
           {