Add explicit checks for non-zero result of platform setup

Author: Andrzej Kurek

authcrypt/main.cpp

@@ -25,7 +25,7 @@
 
 int main() {
     mbedtls_platform_context platform_ctx;
-    if(mbedtls_platform_setup(&platform_ctx)) {
+    if(mbedtls_platform_setup(&platform_ctx) != 0) {
         return -1;
     }
 

benchmark/main.cpp

@@ -962,7 +962,7 @@ static int benchmark( int argc, char *argv[] )
 
 int main(void) {
     mbedtls_platform_context platform_ctx;
-    if(mbedtls_platform_setup(&platform_ctx)) {
+    if(mbedtls_platform_setup(&platform_ctx) != 0) {
         return -1;
     }
 

hashing/main.cpp

@@ -153,7 +153,7 @@ static int example(void)
 
 int main() {
     mbedtls_platform_context platform_ctx;
-    if( mbedtls_platform_setup(&platform_ctx)) {
+    if(mbedtls_platform_setup(&platform_ctx) != 0) {
         return -1;
     }
 

tls-client/main.cpp

@@ -50,7 +50,7 @@ const int SERVER_PORT = 443;
 int main()
 {
     mbedtls_platform_context platform_ctx;
-    if( mbedtls_platform_setup(&platform_ctx)) {
+    if(mbedtls_platform_setup(&platform_ctx) != 0) {
         return -1;
     }
     /*