Fixed crash when opening file

Author: nextgeniuspro

include/vfspp/MemoryFileSystem.hpp

@@ -96,10 +96,13 @@ class MemoryFileSystem final : public IFileSystem
         if (!isExists && !IsReadOnly()) {
             file.reset(new MemoryFile(filePath));
         }
-        file->Open(mode);
-        
-        if (!isExists && file->IsOpened()) {
-            m_FileList.insert(file);
+
+        if (file) {
+            file->Open(mode);
+            
+            if (!isExists && file->IsOpened()) {
+                m_FileList.insert(file);
+            }
         }
 
         return file;

include/vfspp/NativeFileSystem.hpp

@@ -117,10 +117,13 @@ class NativeFileSystem final : public IFileSystem
             mode = mode | IFile::FileMode::Truncate;
             file.reset(new NativeFile(filePath));
         }
-        file->Open(mode);
-        
-        if (!isExists && file->IsOpened()) {
-            m_FileList.insert(file);
+
+        if (file) {
+            file->Open(mode);
+       
+            if (!isExists && file->IsOpened()) {
+                m_FileList.insert(file);
+            }
         }
 
         return file;