tutorials/mesh/foamy.*Mesh::Allrun: Only run if FOAMY_HEX_MESH set

tutorials/mesh/foamyHexMesh/Allrun

@@ -8,25 +8,28 @@ cd ${0%/*} || exit 1    # Run from this directory
 # Source tutorial run functions
 . $WM_PROJECT_DIR/bin/tools/RunFunctions
 
-(
-    cd blob || exit
-    ./Allrun $*
-)
-(
-    cd simpleShapes || exit
-    ./Allrun $*
-)
-
-if ! isTest $@
+if [ -n "$FOAMY_HEX_MESH" ]
 then
     (
-        cd flange || exit
+        cd blob || exit
         ./Allrun $*
     )
     (
-        cd mixerVessel || exit
+        cd simpleShapes || exit
         ./Allrun $*
     )
+
+    if ! isTest $@
+    then
+        (
+            cd flange || exit
+            ./Allrun $*
+        )
+        (
+            cd mixerVessel || exit
+            ./Allrun $*
+        )
+    fi
 fi
 
 #------------------------------------------------------------------------------