Core/Misc: Some fixes here and there

Closes #7277

src/server/collision/Maps/TileAssembler.cpp

@@ -336,10 +336,16 @@ namespace VMAP
     void TileAssembler::exportGameobjectModels()
     {
         FILE* model_list = fopen((iSrcDir + "/" + "temp_gameobject_models").c_str(), "rb");
-        FILE* model_list_copy = fopen((iDestDir + "/" + GAMEOBJECT_MODELS).c_str(), "wb");
-        if (!model_list || !model_list_copy)
+        if (!model_list)
             return;
 
+        FILE* model_list_copy = fopen((iDestDir + "/" + GAMEOBJECT_MODELS).c_str(), "wb");
+        if (!model_list_copy)
+        {
+            fclose(model_list);
+            return;
+        }
+
         uint32 name_length, displayId;
         char buff[500];
         while (!feof(model_list))

src/server/game/DungeonFinding/LFGMgr.cpp

@@ -1239,11 +1239,11 @@ LfgAnswer LFGMgr::GetCompatibles(std::string key)
 void LFGMgr::GetCompatibleDungeons(LfgDungeonSet& dungeons, const PlayerSet& players, LfgLockPartyMap& lockMap)
 {
     lockMap.clear();
-    for (PlayerSet::const_iterator it = players.begin(); it != players.end() && dungeons.size(); ++it)
+    for (PlayerSet::const_iterator it = players.begin(); it != players.end() && !dungeons.empty(); ++it)
     {
         uint64 guid = (*it)->GetGUID();
         LfgLockMap cachedLockMap = GetLockedDungeons(guid);
-        for (LfgLockMap::const_iterator it2 = cachedLockMap.begin(); it2 != cachedLockMap.end() && dungeons.size(); ++it2)
+        for (LfgLockMap::const_iterator it2 = cachedLockMap.begin(); it2 != cachedLockMap.end() && !dungeons.empty(); ++it2)
         {
             uint32 dungeonId = (it2->first & 0x00FFFFFF); // Compare dungeon ids
             LfgDungeonSet::iterator itDungeon = dungeons.find(dungeonId);

src/tools/vmap4_extractor/vmapexport.cpp

@@ -382,7 +382,7 @@ bool processArgv(int argc, char ** argv, const char *versionString)
 {
     bool result = true;
     hasInputPathParam = false;
-    bool preciseVectorData = false;
+    preciseVectorData = false;
 
     for(int i = 1; i < argc; ++i)
     {
@@ -482,7 +482,7 @@ int main(int argc, char ** argv)
     for (size_t i=0; i < archiveNames.size(); ++i)
     {
         MPQArchive *archive = new MPQArchive(archiveNames[i].c_str());
-        if(!gOpenArchives.size() || gOpenArchives.front() != archive)
+        if (gOpenArchives.empty() || gOpenArchives.front() != archive)
             delete archive;
     }