Fixed a crash that would occur when old symbol information was reused

Source/Core/DolphinWX/FrameTools.cpp

@@ -58,6 +58,7 @@
 #include "Core/IPC_HLE/WII_IPC_HLE_Device_usb.h"
 #include "Core/IPC_HLE/WII_IPC_HLE_WiiMote.h"
 #include "Core/PowerPC/PowerPC.h"
+#include "Core/PowerPC/PPCSymbolDB.h"
 
 #include "DiscIO/NANDContentLoader.h"
 
@@ -1193,6 +1194,8 @@ void CFrame::DoStop()
 					PowerPC::memchecks.Clear();
 					g_pCodeWindow->m_BreakpointWindow->NotifyUpdate();
 				}
+				g_symbolDB.Clear();
+				Host_NotifyMapLoaded();
 			}
 		}