Fix issues reported by SonarQube

%d in format string requires 'int *'

Fixed.

Uninitialized variable: p

Should be fixed.

src/common/Session.cpp

@@ -286,7 +286,7 @@ void Session::get_palettes_name(const std::string &type, QStringList &list) {
 }
 
 Palette *Session::get_palette(const std::string &type, const std::string &palette_name) {
-    Palette *p, **where_from;
+    Palette *p = NULL, **where_from;
     if( type == "palette" ) {
         p = _palettes_state;
         where_from = &_palettes_state;