wxGUI/psmap: fix vector map properties dialog correct typing the name…

… of the vector map (#3087)

* Use gs.find_file() func instead of pygrass module

gui/wxpython/psmap/dialogs.py

@@ -1866,11 +1866,13 @@ def _layout(self):
     def OnVector(self, event):
         """Gets info about toplogy and enables/disables choices point/line/area"""
         vmap = self.select.GetValue()
-        try:
-            topoInfo = grass.vector_info_topo(map=vmap)
-        except grass.ScriptError:
+        if not grass.find_file(
+            vmap,
+            element="vector",
+        )["name"]:
             return
 
+        topoInfo = grass.vector_info_topo(map=vmap)
         if topoInfo:
             self.vectorType.EnableItem(2, bool(topoInfo["areas"]))
             self.vectorType.EnableItem(