Fix missing null terminator in lept_parse_object()

Author: miloyip

tutorial06_answer/leptjson.c

@@ -260,7 +260,8 @@ static int lept_parse_object(lept_context* c, lept_value* v) {
         }
         if ((ret = lept_parse_string_raw(c, &str, &m.klen)) != LEPT_PARSE_OK)
             break;
-        memcpy(m.k = (char*)malloc(m.klen + 1), str, m.klen + 1);
+        memcpy(m.k = (char*)malloc(m.klen + 1), str, m.klen);
+        m.k[m.klen] = '\0';
         /* parse ws colon ws */
         lept_parse_whitespace(c);
         if (*c->json != ':') {

tutorial06_answer/test.c

@@ -25,7 +25,7 @@ static int test_pass = 0;
 #define EXPECT_EQ_INT(expect, actual) EXPECT_EQ_BASE((expect) == (actual), expect, actual, "%d")
 #define EXPECT_EQ_DOUBLE(expect, actual) EXPECT_EQ_BASE((expect) == (actual), expect, actual, "%.17g")
 #define EXPECT_EQ_STRING(expect, actual, alength) \
-    EXPECT_EQ_BASE(sizeof(expect) - 1 == alength && memcmp(expect, actual, alength) == 0, expect, actual, "%s")
+    EXPECT_EQ_BASE(sizeof(expect) - 1 == alength && memcmp(expect, actual, alength + 1) == 0, expect, actual, "%s")
 #define EXPECT_TRUE(actual) EXPECT_EQ_BASE((actual) != 0, "true", "false", "%s")
 #define EXPECT_FALSE(actual) EXPECT_EQ_BASE((actual) == 0, "false", "true", "%s")