$NetBSD$

Avoid undefined behvior, caught by gcc.

--- apps/edit/src/intrface/strucdlg.cpp~	2006-05-03 11:41:00.000000000 +0000
+++ apps/edit/src/intrface/strucdlg.cpp
@@ -286,7 +286,7 @@ void StructuresDialog::CmOk(wxCommandEve
       selectedStruct = selectedStruct.Mid( 0, top );
 	_structure = _structurelist->GetStructure(selectedStruct);
    if (_structure)
-		GLOB->CMDH->DoCommand("viewstructure %s",selectedStruct);
+		GLOB->CMDH->DoCommand("viewstructure %s", (const char *)selectedStruct);
 }
 
 // OK button pressed: get the choosen structure
@@ -299,7 +299,7 @@ void StructuresDialog::CmShow(wxCommandE
       selectedStruct = selectedStruct.Mid( 0, top );
 	_structure = _structurelist->GetStructure(selectedStruct);
    if (_structure)
-		GLOB->CMDH->DoCommand("viewstructure %s",selectedStruct);
+		GLOB->CMDH->DoCommand("viewstructure %s", (const char *)selectedStruct);
 }
 
 Structure* StructuresDialog::GetStructure()
