Fixed|Client: Clearing the DED database

memset cannot be used because it contains a C++ member.

doomsday/client/include/def_data.h

@@ -592,7 +592,7 @@ typedef struct ded_compositefont_s {
 // index numbers are important. The Game DLL must be recompiled with the
 // new constants if the order of the array items changes.
 
-typedef struct ded_s {
+struct ded_s {
     int             version; // DED version number.
     ded_flags_t     modelFlags; // Default values for models.
     float           modelScale;
@@ -695,7 +695,41 @@ typedef struct ded_s {
 
     // Composite fonts.
     ded_compositefont_t* compositeFonts;
-} ded_t;
+
+	/// Constructor initializes everything to zero.
+	ded_s() 
+		: version(DED_VERSION),
+		  modelFlags(0),
+		  modelScale(0),
+		  modelOffset(0),
+		  flags(0),
+		  mobjs(0),
+		  states(0),
+		  sprites(0),
+		  lights(0),
+		  materials(0),
+		  skies(0),
+		  sounds(0),
+		  music(0),
+		  mapInfo(0),
+		  text(0),
+		  textureEnv(0),
+		  values(0),
+		  details(0),
+		  ptcGens(0),
+		  finales(0),
+		  decorations(0),
+		  reflections(0),
+		  groups(0),
+		  lineTypes(0),
+		  sectorTypes(0),
+		  compositeFonts(0)
+	{
+		de::zap(count);
+	}
+};
+
+typedef ded_s ded_t;
 
 #ifdef __cplusplus
 extern "C" {

doomsday/client/src/def_data.cpp

@@ -93,8 +93,7 @@ void DED_ZCount(ded_count_t* c)
 
 void DED_Init(ded_t* ded)
 {
-    memset(ded, 0, sizeof(*ded));
-    ded->version = DED_VERSION;
+	*ded = ded_t();
 }
 
 void DED_Clear(ded_t* ded)