Fix a few Coverity warnings

eeschema/cmp_tree_model.cpp

@@ -164,7 +164,7 @@ CMP_TREE_NODE_LIB_ID::CMP_TREE_NODE_LIB_ID( CMP_TREE_NODE* aParent, LIB_ALIAS* a
         SearchText += footprint.Lower();
     }
 
-    if( part->IsMulti() )
+    if( part && part->IsMulti() )
     {
         for( int u = 1; u <= part->GetUnitCount(); ++u )
         {

eeschema/dialogs/dialog_edit_components_libid.cpp

@@ -58,6 +58,7 @@ public:
         m_InitialLibId = m_Component->GetLibId().Format();
         m_Row = -1;
         m_IsOrphan = false;
+        m_Screen = nullptr;
     }
 
     // Returns a string like mylib:symbol_name from the LIB_ID of the component

eeschema/hierarch.cpp

@@ -243,7 +243,9 @@ void HIERARCHY_NAVIG_DLG::BuildTree( SCH_SHEET_PATH* list, wxTreeItemId*  previo
             m_TreeSize.x  = std::max( m_TreeSize.x, ll );
             m_TreeSize.y += 1;
 
-            if( *list == dynamic_cast< SCH_EDIT_FRAME* >( GetParent() )->GetCurrentSheet() )
+            SCH_EDIT_FRAME* parent = dynamic_cast< SCH_EDIT_FRAME* >( GetParent() );
+
+            if( parent && *list == parent->GetCurrentSheet() )
             {
                 m_Tree->EnsureVisible( menu );
                 m_Tree->SelectItem( menu );

gerbview/tools/selection_tool.cpp

@@ -144,6 +144,8 @@ GERBVIEW_SELECTION_TOOL::GERBVIEW_SELECTION_TOOL() :
         m_multiple( false ),
         m_menu( *this )
 {
+    // these members are initialized to avoid warnings about non initialized vars
+    m_preliminary = true;
 }
 
 

pcbnew/import_dxf/dialog_dxf_import.cpp

@@ -66,6 +66,8 @@ DIALOG_DXF_IMPORT::DIALOG_DXF_IMPORT( PCB_BASE_FRAME* aParent, bool aImportAsFoo
     m_PcbImportUnits = 0;
     m_PcbImportOffsetX = 0.0;   // always in mm
     m_PcbImportOffsetY = 0.0;   // always in mm
+    m_PCBdefaultLineWidth = 0.2; // in mm
+    m_PCBLineWidthUnits = 0;
 
     if( m_config )
     {

pcbnew/kicad_clipboard.cpp

@@ -308,7 +308,7 @@ BOARD* CLIPBOARD_IO::Load( const wxString& aFileName,
     }
 
     // Give the filename to the board if it's new
-    if( !aAppendToMe )
+    if( board && !aAppendToMe )
         board->SetFileName( aFileName );
 
     return board;

qa/common/mocks.cpp

@@ -198,9 +198,12 @@ void BOARD::Draw( EDA_DRAW_PANEL* aPanel, wxDC* DC, GR_DRAWMODE aDrawMode, const
 wxString DIALOG_FIND::prevSearchString;
 bool DIALOG_FIND::warpMouse = true;
 
-
 DIALOG_FIND::DIALOG_FIND( PCB_BASE_FRAME* aParent ) : DIALOG_FIND_BASE( aParent )
 {
+    // these members are initialized to avoid warnings about non initialized vars
+    parent = aParent;
+    itemCount = markerCount = 0;
+    foundItem = nullptr;
 }
 
 
@@ -241,6 +244,13 @@ DIALOG_FIND_BASE::DIALOG_FIND_BASE( wxWindow* parent,
         const wxSize& size,
         long style ) : DIALOG_SHIM( parent, id, title, pos, size, style )
 {
+    // these members are initialized only to avoid warnings about non initialized vars
+    m_staticText1 = nullptr;
+    m_SearchTextCtrl = nullptr;
+    m_NoMouseWarpCheckBox = nullptr;
+    m_button1 = nullptr;
+    m_button2 = nullptr;
+    m_button3 = nullptr;
 }
 
 
@@ -280,6 +290,20 @@ DIALOG_BLOCK_OPTIONS_BASE::DIALOG_BLOCK_OPTIONS_BASE( wxWindow* parent,
         const wxSize& size,
         long style ) : DIALOG_SHIM( parent, id, title, pos, size, style )
 {
+    // these members are initialized only to avoid warnings about non initialized vars
+    m_Include_Modules = nullptr;
+    m_Include_PcbTextes = nullptr;
+    m_IncludeLockedModules = nullptr;
+    m_Include_Draw_Items = nullptr;
+    m_Include_Tracks = nullptr;
+    m_Include_Edges_Items = nullptr;
+    m_Include_Zones = nullptr;
+    m_DrawBlockItems = nullptr;
+    m_staticline1 = nullptr;
+    m_checkBoxIncludeInvisible = nullptr;
+    m_sdbSizer1 = nullptr;
+    m_sdbSizer1OK = nullptr;
+    m_sdbSizer1Cancel = nullptr;
 }