More exception var disuse warnings

pcbnew/pcb_base_frame.cpp

@@ -194,7 +194,7 @@ void PCB_BASE_FRAME::FocusOnItem( BOARD_ITEM* aItem )
     {
         lastItem = GetBoard()->GetItem( lastBrightenedItemID );
     }
-    catch( const boost::uuids::entropy_error& e )
+    catch( const boost::uuids::entropy_error& )
     {
         wxLogError( "A Boost UUID entropy exception was thrown in %s:%s.", __FILE__, __FUNCTION__ );
     }

pcbnew/swig/pcbnew_scripting_helpers.cpp

@@ -374,7 +374,7 @@ bool WriteDRCReport( BOARD* aBoard, const wxString& aFileName, EDA_UNITS aUnits,
     {
         engine->InitEngine( drcRulesPath );
     }
-    catch( PARSE_ERROR& pe )
+    catch( PARSE_ERROR& )
     {
         return false;
     }

pcbnew/tools/board_inspection_tool.cpp

@@ -224,7 +224,7 @@ void BOARD_INSPECTION_TOOL::reportClearance( DRC_CONSTRAINT_T aClearanceType, PC
     {
         drcEngine.InitEngine( m_frame->GetDesignRulesPath() );
     }
-    catch( PARSE_ERROR& pe )
+    catch( PARSE_ERROR& )
     {
         r->Report( "" );
         r->Report( _( "Report incomplete: could not compile custom design rules.  " )
@@ -490,7 +490,7 @@ int BOARD_INSPECTION_TOOL::InspectConstraints( const TOOL_EVENT& aEvent )
     {
         drcEngine.InitEngine( m_frame->GetDesignRulesPath() );
     }
-    catch( PARSE_ERROR& pe )
+    catch( PARSE_ERROR& )
     {
         compileError = true;
     }

pcbnew/tools/drawing_tool.cpp

@@ -2119,7 +2119,7 @@ int DRAWING_TOOL::DrawVia( const TOOL_EVENT& aEvent )
                         m_worstClearance = std::max( m_worstClearance, pad->GetLocalClearance() );
                 }
             }
-            catch( PARSE_ERROR& pe )
+            catch( PARSE_ERROR& )
             {
             }
         }