STORM-467 Fix for minimap zoom does not persist to the next session

doc/contributions.txt

@@ -735,6 +735,7 @@ Tue Torok
 	CT-74
 Twisted Laws
 	SNOW-352
+	STORM-467
 Vadim Bigbear
 	VWR-2681
 Vector Hastings

indra/newview/llfloatermap.cpp

@@ -83,7 +83,6 @@ LLFloaterMap::~LLFloaterMap()
 BOOL LLFloaterMap::postBuild()
 {
 	mMap = getChild<LLNetMap>("Net Map");
-	mMap->setScale(gSavedSettings.getF32("MiniMapScale"));
 	mMap->setToolTipMsg(getString("ToolTipMsg"));	
 	sendChildToBack(mMap);
 	
@@ -296,7 +295,6 @@ void LLFloaterMap::handleZoom(const LLSD& userdata)
 		scale = LLNetMap::MAP_SCALE_MIN;
 	if (scale != 0.0f)
 	{
-		gSavedSettings.setF32("MiniMapScale", scale );
 		mMap->setScale(scale);
 	}
 }

indra/newview/llnetmap.cpp

@@ -94,10 +94,12 @@ LLNetMap::LLNetMap (const Params & p)
 	mToolTipMsg()
 {
 	mDotRadius = llmax(DOT_SCALE * mPixelsPerMeter, MIN_DOT_RADIUS);
+	setScale(gSavedSettings.getF32("MiniMapScale"));
 }
 
 LLNetMap::~LLNetMap()
 {
+	gSavedSettings.setF32("MiniMapScale", mScale);
 }
 
 void LLNetMap::setScale( F32 scale )