Add a workaround for max test suite parameter sizes

int isn't enough for SIZE_MAX/2.
Hardcoding the value will make the compilers complain.
Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
diff --git a/tests/suites/test_suite_debug.data b/tests/suites/test_suite_debug.data
index 5952623..87ec67c 100644
--- a/tests/suites/test_suite_debug.data
+++ b/tests/suites/test_suite_debug.data
@@ -67,4 +67,4 @@
 mbedtls_debug_print_crt:"data_files/test-ca2.crt":"MyFile":999:"PREFIX_":"MyFile(0999)\: PREFIX_ #1\:\nMyFile(0999)\: cert. version     \: 3\nMyFile(0999)\: serial number     \: C1\:43\:E2\:7E\:62\:43\:CC\:E8\nMyFile(0999)\: issuer name       \: C=NL, O=PolarSSL, CN=Polarssl Test EC CA\nMyFile(0999)\: subject name      \: C=NL, O=PolarSSL, CN=Polarssl Test EC CA\nMyFile(0999)\: issued  on        \: 2019-02-10 14\:44\:00\nMyFile(0999)\: expires on        \: 2029-02-10 14\:44\:00\nMyFile(0999)\: signed using      \: ECDSA with SHA256\nMyFile(0999)\: EC key size       \: 384 bits\nMyFile(0999)\: basic constraints \: CA=true\nMyFile(0999)\: value of 'crt->eckey.Q(X)' (384 bits) is\:\nMyFile(0999)\:  c3 da 2b 34 41 37 58 2f 87 56 fe fc 89 ba 29 43\nMyFile(0999)\:  4b 4e e0 6e c3 0e 57 53 33 39 58 d4 52 b4 91 95\nMyFile(0999)\:  39 0b 23 df 5f 17 24 62 48 fc 1a 95 29 ce 2c 2d\nMyFile(0999)\: value of 'crt->eckey.Q(Y)' (384 bits) is\:\nMyFile(0999)\:  87 c2 88 52 80 af d6 6a ab 21 dd b8 d3 1c 6e 58\nMyFile(0999)\:  b8 ca e8 b2 69 8e f3 41 ad 29 c3 b4 5f 75 a7 47\nMyFile(0999)\:  6f d5 19 29 55 69 9a 53 3b 20 b4 66 16 60 33 1e\n"
 
 Check mbedtls_calloc overallocation
-check_mbedtls_calloc_overallocation:SIZE_MAX/2:SIZE_MAX/2
+check_mbedtls_calloc_overallocation:1:1
diff --git a/tests/suites/test_suite_debug.function b/tests/suites/test_suite_debug.function
index 617dd88..34e006f 100644
--- a/tests/suites/test_suite_debug.function
+++ b/tests/suites/test_suite_debug.function
@@ -200,7 +200,7 @@
 void check_mbedtls_calloc_overallocation(int num, int size)
 {
     unsigned char *buf;
-    buf = mbedtls_calloc((size_t) num, (size_t) size);
+    buf = mbedtls_calloc((size_t) num * SIZE_MAX/2, (size_t) size * SIZE_MAX/2);
     /* Dummy usage of the pointer to prevent optimizing it */
     mbedtls_printf("calloc pointer : %p\n", buf);
     TEST_ASSERT(buf == NULL);