Fix missing-prototype errors in tests/suites

Signed-off-by: Michael Schuster <michael@schuster.ms>
diff --git a/tests/suites/test_suite_x509parse.function b/tests/suites/test_suite_x509parse.function
index ba71c8f..e72a6e3 100644
--- a/tests/suites/test_suite_x509parse.function
+++ b/tests/suites/test_suite_x509parse.function
@@ -60,7 +60,7 @@
     1024,
 };
 
-int verify_none(void *data, mbedtls_x509_crt *crt, int certificate_depth, uint32_t *flags)
+static int verify_none(void *data, mbedtls_x509_crt *crt, int certificate_depth, uint32_t *flags)
 {
     ((void) data);
     ((void) crt);
@@ -70,7 +70,7 @@
     return 0;
 }
 
-int verify_all(void *data, mbedtls_x509_crt *crt, int certificate_depth, uint32_t *flags)
+static int verify_all(void *data, mbedtls_x509_crt *crt, int certificate_depth, uint32_t *flags)
 {
     ((void) data);
     ((void) crt);
@@ -81,7 +81,7 @@
 }
 
 #if defined(MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK)
-int ca_callback_fail(void *data, mbedtls_x509_crt const *child, mbedtls_x509_crt **candidates)
+static int ca_callback_fail(void *data, mbedtls_x509_crt const *child, mbedtls_x509_crt **candidates)
 {
     ((void) data);
     ((void) child);
@@ -90,7 +90,7 @@
     return -1;
 }
 #if defined(MBEDTLS_X509_CRT_PARSE_C)
-int ca_callback(void *data, mbedtls_x509_crt const *child,
+static int ca_callback(void *data, mbedtls_x509_crt const *child,
                 mbedtls_x509_crt **candidates)
 {
     int ret = 0;
@@ -141,7 +141,7 @@
 #endif /* MBEDTLS_X509_CRT_PARSE_C */
 #endif /* MBEDTLS_X509_TRUSTED_CERTIFICATE_CALLBACK */
 
-int verify_fatal(void *data, mbedtls_x509_crt *crt, int certificate_depth, uint32_t *flags)
+static int verify_fatal(void *data, mbedtls_x509_crt *crt, int certificate_depth, uint32_t *flags)
 {
     int *levels = (int *) data;
 
@@ -158,7 +158,7 @@
 }
 
 /* strsep() not available on Windows */
-char *mystrsep(char **stringp, const char *delim)
+static char *mystrsep(char **stringp, const char *delim)
 {
     const char *p;
     char *ret = *stringp;
@@ -192,13 +192,13 @@
     char *p;
 } verify_print_context;
 
-void verify_print_init(verify_print_context *ctx)
+static void verify_print_init(verify_print_context *ctx)
 {
     memset(ctx, 0, sizeof(verify_print_context));
     ctx->p = ctx->buf;
 }
 
-int verify_print(void *data, mbedtls_x509_crt *crt, int certificate_depth, uint32_t *flags)
+static int verify_print(void *data, mbedtls_x509_crt *crt, int certificate_depth, uint32_t *flags)
 {
     int ret;
     verify_print_context *ctx = (verify_print_context *) data;
@@ -226,7 +226,7 @@
     return 0;
 }
 
-int verify_parse_san(mbedtls_x509_subject_alternative_name *san,
+static int verify_parse_san(mbedtls_x509_subject_alternative_name *san,
                      char **buf, size_t *size)
 {
     int ret;
@@ -317,7 +317,7 @@
     return 0;
 }
 
-int parse_crt_ext_cb(void *p_ctx, mbedtls_x509_crt const *crt, mbedtls_x509_buf const *oid,
+static int parse_crt_ext_cb(void *p_ctx, mbedtls_x509_crt const *crt, mbedtls_x509_buf const *oid,
                      int critical, const unsigned char *cp, const unsigned char *end)
 {
     (void) crt;
@@ -417,7 +417,7 @@
 #endif /* MBEDTLS_X509_CRT_PARSE_C */
 
 #if defined(MBEDTLS_X509_CSR_PARSE_C)
-int parse_csr_ext_accept_cb(void *p_ctx, mbedtls_x509_csr const *csr, mbedtls_x509_buf const *oid,
+static int parse_csr_ext_accept_cb(void *p_ctx, mbedtls_x509_csr const *csr, mbedtls_x509_buf const *oid,
                             int critical, const unsigned char *cp, const unsigned char *end)
 {
     (void) p_ctx;
@@ -430,7 +430,7 @@
     return 0;
 }
 
-int parse_csr_ext_reject_cb(void *p_ctx, mbedtls_x509_csr const *csr, mbedtls_x509_buf const *oid,
+static int parse_csr_ext_reject_cb(void *p_ctx, mbedtls_x509_csr const *csr, mbedtls_x509_buf const *oid,
                             int critical, const unsigned char *cp, const unsigned char *end)
 {
     (void) p_ctx;