[Mindmapping] Fix run.sh for some linux users

mindmapping_to_hdoc/run.sh

@@ -32,7 +32,7 @@ fi
 #Lancer la commande
 scJarList="$lib/*"
 
-if [ "$inputPath" == '' ] ; then
+if [ -z "$inputPath" ]; then
 	echo "Appel sans paramètre"
 	$vJavaCmd -classpath "$scJarList:" -Xmx150m org.apache.tools.ant.Main -buildfile $ant $antparam
 else