Merge pull request #1144 from chinggg/fix-unmap_all

fix(memory): remove misused region bound check of unmap_all

Author: wtdcode

qiling/os/memory.py

@@ -419,8 +419,7 @@ def unmap_all(self):
         """
 
         for begin, end, _ in self.ql.uc.mem_regions():
-            if begin and end:
-                self.unmap(begin, end - begin + 1)
+            self.unmap(begin, end - begin + 1)
 
     def is_available(self, addr: int, size: int) -> bool:
         """Query whether the memory range starting at `addr` and is of length of `size` bytes