Fixes issue 2524, Slot Calculation for Variables that Cross 32-Byte Boundaries

Author: Jayakumar2812

slither/tools/read_storage/read_storage.py

@@ -582,7 +582,7 @@ def _find_struct_var_slot(
             var_type = var.type
             if isinstance(var_type, ElementaryType):
                 size = var_type.size
-                if offset >= 256:
+                if size > (256 - offset):
                     slot += 1
                     offset = 0
                 if struct_var == var.name: