Fix parantheses on return and sizeof statements.

Used script:
```
import re
import sys

for arg in sys.argv[1:]:
    print(arg)
    with open(arg, 'r') as file:
        content = file.read()
        content = re.sub(r"return\s?\((?!.*\).*\()\s*\n?(.*)\n?\);", r"return \1;", \
            content, flags = re.M)
        content = re.sub(r"sizeof ([^\(][a-zA-Z0-9_\[\]]*)", r"sizeof(\1)",\
            content, flags = re.M)
    with open(arg, 'w') as file:
        file.write(content)

```
Executed with:
` find . -regextype posix-egrep -regex ".*\.([hc]|fmt|function)" | xargs -L1 python script.py`

Signed-off-by: Mateusz Starzyk <mateusz.starzyk@mobica.com>
diff --git a/programs/ssl/ssl_mail_client.c b/programs/ssl/ssl_mail_client.c
index 32960ad..2477979 100644
--- a/programs/ssl/ssl_mail_client.c
+++ b/programs/ssl/ssl_mail_client.c
@@ -190,7 +190,7 @@
             mbedtls_strerror( ret, (char *) buf, 1024 );
 #endif
             mbedtls_printf( " failed\n  ! mbedtls_ssl_handshake returned %d: %s\n\n", ret, buf );
-            return( -1 );
+            return -1 ;
         }
     }
 
@@ -227,7 +227,7 @@
     mbedtls_printf( "%s\n", buf );
 #endif
 
-    return( 0 );
+    return 0 ;
 }
 
 static int write_ssl_data( mbedtls_ssl_context *ssl, unsigned char *buf, size_t len )
@@ -244,7 +244,7 @@
         }
     }
 
-    return( 0 );
+    return 0 ;
 }
 
 static int write_ssl_and_get_response( mbedtls_ssl_context *ssl, unsigned char *buf, size_t len )