Fix some compile issues and desktop launcher issues

src/sdl/expr.ypp

@@ -4,10 +4,9 @@ namespace std {
 #include <memory.h>
 #include <stdlib.h>
 #include <string.h>
+#include <cstdlib>
 }
  
-using namespace std;
- 
 #include "../System.h"
 #include "../gba/elf.h"
 #include "exprNode.h" 

src/wx/wxvbam.desktop

@@ -4,7 +4,7 @@ Type=Application
 Name=VBA-M
 GenericName=Game Boy Advance Emulator
 Comment=Nintendo Game Boy Advance Emulator
-Exec=visualboyadvance-m-wx %f
+Exec=visualboyadvance-m %f
 Icon=vbam
 Categories=Game;Emulator;
 Keywords=emulator;Nintendo;gameboy;Game Boy;Game Boy Color;Game Boy Advance;