Merge branch 'fix/fix_unused_variable_warning_protocol_common' into 'master'

fix: Fix a warning related to an unused argument

Closes ESF-88

See merge request espressif/esp-serial-flasher!81

src/protocol_common.c

@@ -297,5 +297,5 @@ esp_loader_error_t loader_spi_parameters(uint32_t total_size)
 
 __attribute__ ((weak)) void loader_port_debug_print(const char *str)
 {
-
+    (void) str;
 }