Fix memleak in test_buf & test_cmd (#18162)

libr/core/cmd_api.c

@@ -460,7 +460,9 @@ static void fill_children_chars(RStrBuf *sb, RCmdDesc *cd) {
 		r_strbuf_prepend (&csb, "<");
 		r_strbuf_append (&csb, ">");
 	}
-	r_strbuf_append (sb, r_strbuf_drain_nofree (&csb));
+	char *tmp = r_strbuf_drain_nofree (&csb);
+	r_strbuf_append (sb, tmp);
+	free (tmp);
 }
 
 static bool show_children_shortcut(RCmdDesc *cd) {

test/unit/test_buf.c

@@ -122,6 +122,7 @@ bool test_r_buf_file(void) {
 	// Cleanup
 	r_buf_free (b);
 	unlink (filename);
+	free (filename);
 	mu_end;
 }
 
@@ -165,6 +166,7 @@ bool test_r_buf_mmap(void) {
 	// Cleanup
 	r_buf_free (b);
 	unlink(filename);
+	free (filename);
 	mu_end;
 }
 

test/unit/test_cmd.c

@@ -166,6 +166,7 @@ bool test_cmd_descriptor_group(void) {
 	free (h);
 
 	r_cmd_free (cmd);
+	r_cmd_parsed_args_free (pa);
 	mu_end;
 }