VFS: Fix uninitialized varaible reading from 7z

CHANGES

@@ -30,6 +30,7 @@ Bugfixes:
  - GBA Video: WIN0/1 take priority over OBJWIN
  - PSP2: Fix mapping/unmapping from not at 0
  - Wii: Fix garbage flash at startup
+ - VFS: Fix uninitialized varaible reading from 7z
 Misc:
  - 3DS: Use blip_add_delta_fast for a small speed improvement
  - OpenGL: Log shader compilation failure

src/util/vfs/vfs-lzma.c

@@ -301,6 +301,7 @@ struct VFile* _vd7zOpenFile(struct VDir* vd, const char* path, int mode) {
 	vf->d.truncate = _vf7zTruncate;
 	vf->d.size = _vf7zSize;
 	vf->d.sync = _vf7zSync;
+	vf->offset = 0;
 
 	return &vf->d;
 }