fix .

Author: Vipul-Cariappa

src/lpython/tests/test_llvm.cpp

@@ -991,7 +991,7 @@ TEST_CASE("PythonCompiler i8 expressions") {
     r = e.evaluate2("i8(1) - i8(2)");
     CHECK(r.ok);
     CHECK(r.result.type == PythonCompiler::EvalResult::integer1);
-    CHECK(r.result.i8 == -1);
+    CHECK(r.result.i8 == (int8_t)-1);
 
     r = e.evaluate2("i8(1) * i8(2)");
     CHECK(r.ok);
@@ -1153,7 +1153,7 @@ TEST_CASE("PythonCompiler i16 expressions") {
     r = e.evaluate2("i16(1) - i16(2)");
     CHECK(r.ok);
     CHECK(r.result.type == PythonCompiler::EvalResult::integer2);
-    CHECK(r.result.i16 == -1);
+    CHECK(r.result.i16 == (int16_t)-1);
 
     r = e.evaluate2("i16(1) * i16(2)");
     CHECK(r.ok);