Allow SYSTEM_ERROR_RETRY_ON_SPECIFIC_ERRNO macro to be included in a simple 'if' without {}

include/blc_tools.h

@@ -130,7 +130,7 @@ if file is NULL this exit with a error message showing the position of the error
 #define SYSTEM_SUCCESS_CHECK(command, good_value, ...) do{if ((command) != good_value) blc_fatal_command_system_error(__FILE__, __FUNCTION__, __LINE__, STRINGIFY(command),__VA_ARGS__);}while(0)
 
 /**Like SYSTEM_ERROR_CHECK but the command is reexecuted if the errno is errno_accepted (Usually in case of interruption EINTR).*/
-#define SYSTEM_ERROR_RETRY_ON_SPECIFIC_ERRNO(command, bad_value, errno_accepted, ...) while((command) == bad_value) { if (errno!=(errno_accepted)) blc_fatal_command_system_error(__FILE__, __FUNCTION__, __LINE__, STRINGIFY(command),__VA_ARGS__);}
+#define SYSTEM_ERROR_RETRY_ON_SPECIFIC_ERRNO(command, bad_value, errno_accepted, ...) do{while((command) == bad_value) { if (errno!=(errno_accepted)) blc_fatal_command_system_error(__FILE__, __FUNCTION__, __LINE__, STRINGIFY(command),__VA_ARGS__);}}while(0)
 
 /**Do a malloc big enough to contain 'type', checks if it succeeds and return the memory casted as 'type*'.
 @code{.c}