Fix test_elf64_symtab test

The test_elf64_symtab test compares the ELF reported symbol size with
the one returned by ElfParser::find_sym(). However, those two are not
guaranteed to match up: if an ELF symbol has a size of 0 its size is
"zero or unknown". As such, we report the size as None instead. Adjust
the logic to deal with this condition properly.

Signed-off-by: Daniel Müller <[email protected]>

src/elf/parser.rs

@@ -1473,7 +1473,7 @@ mod tests {
         let sym = parser.find_sym(addr, &FindSymOpts::Basic).unwrap().unwrap();
         assert_eq!(sym.addr, addr);
         assert_eq!(sym.name, name);
-        assert_eq!(sym.size, Some(size));
+        assert!(sym.size.is_none() && size == 0 || sym.size.unwrap() == size);
     }
 
     #[test]