Appease clippy

src/analysis/int.rs

@@ -360,7 +360,7 @@ pub fn analysis<'module>(
         // Calls to external functions have unknown return values
         operand_val(caller_ctx, call_name.operand(), IntLattice::top()) <--
           calls(caller_ctx, call_name, callee_name, callee_ctx),
-          if module.decls.get(callee_name).is_some();
+          if module.decls.contains_key(callee_name);
 
         // ----------------------------------------------------------
         // argc

src/analysis/pointer.rs

@@ -878,7 +878,7 @@ pub fn analysis<'module>(
           if !name.starts_with("llvm.memcpy") &&
              !name.starts_with("llvm.memmove"),
           if !known_functions.contains(name.as_ref()),
-          if sigs.get(name).is_none(),
+          if !sigs.contains_key(name),
           if decl.has_pointer();
 
         // Functions without signatures must be treated conservatively