Fix compiler error when QCBOR_DISABLE_INDEFINITE_LENGTH_STRINGS is defined (#142)

A problem with compiling the test fan out was introduced with fix to #135


Co-authored-by: Laurence Lundblade <lgl@securitytheory.com>
diff --git a/test/qcbor_decode_tests.c b/test/qcbor_decode_tests.c
index edb0861..e0d8202 100644
--- a/test/qcbor_decode_tests.c
+++ b/test/qcbor_decode_tests.c
@@ -6050,6 +6050,8 @@
    return 0;
 }
 
+#ifndef QCBOR_DISABLE_INDEFINITE_LENGTH_STRINGS
+
 int32_t CBORTestIssue134()
 {
    QCBORDecodeContext DCtx;
@@ -6073,6 +6075,8 @@
    return uCBORError;
 }
 
+#endif /* QCBOR_DISABLE_INDEFINITE_LENGTH_STRINGS */
+
 int32_t CBORSequenceDecodeTests(void)
 {
    QCBORDecodeContext DCtx;