more fix for STORM-1298: Crash on startup of Second Life 2.7.1(231307)

indra/newview/llviewertexturelist.cpp

@@ -281,6 +281,8 @@ void LLViewerTextureList::shutdown()
 	mUUIDMap.clear();
 	
 	mImageList.clear();
+
+	mInitialized = FALSE ; //prevent loading textures again.
 }
 
 void LLViewerTextureList::dump()
@@ -328,6 +330,11 @@ LLViewerFetchedTexture* LLViewerTextureList::getImageFromFile(const std::string&
 												   LLGLenum primary_format, 
 												   const LLUUID& force_id)
 {
+	if(!mInitialized)
+	{
+		return NULL ;
+	}
+
 	std::string full_path = gDirUtilp->findSkinnedFilename("textures", filename);
 	if (full_path.empty())
 	{
@@ -348,6 +355,11 @@ LLViewerFetchedTexture* LLViewerTextureList::getImageFromUrl(const std::string&
 												   LLGLenum primary_format, 
 												   const LLUUID& force_id)
 {
+	if(!mInitialized)
+	{
+		return NULL ;
+	}
+
 	// generate UUID based on hash of filename
 	LLUUID new_id;
 	if (force_id.notNull())
@@ -407,6 +419,11 @@ LLViewerFetchedTexture* LLViewerTextureList::getImage(const LLUUID &image_id,
 												   LLGLenum primary_format,
 												   LLHost request_from_host)
 {
+	if(!mInitialized)
+	{
+		return NULL ;
+	}
+
 	// Return the image with ID image_id
 	// If the image is not found, creates new image and
 	// enqueues a request for transmission