Fixed "%s" always being left justify

[F1F88]

Related to: #2331

This only fixes "%s" to always be left-aligned, not include the fix for padding '0'.

If need, I can add a commit to fix the padding '0'.

Test cases

#include <sourcemod>

public void OnPluginStart()
{
    char[] text = "abcde1234567890";

    PrintToServer("|%s|", NULL_STRING);
    PrintToServer("|%s|", text);

    PrintToServer("|%.10s|", text);
    PrintToServer("|%0.10s|", text);
    PrintToServer("|%-.10s|", text);
    PrintToServer("|%-0.10s|", text);

    PrintToServer("|%20s|", text);
    PrintToServer("|%020s|", text);
    PrintToServer("|%-20s|", text);
    PrintToServer("|%-020s|", text);
}

Click to expand the output before fix

sm plugins reload test
||
|abcde1234567890|
|abcde12345|
|abcde12345|
|abcde12345|
|abcde12345|
|abcde1234567890     |
|abcde1234567890     |
|abcde1234567890     |
|abcde1234567890     |
[SM] Plugin test.smx reloaded successfully.

Click to expand the output after fix

sm plugins reload test
||
|abcde1234567890|
|abcde12345|
|abcde12345|
|abcde12345|
|abcde12345|
|     abcde1234567890|
|     abcde1234567890|
|abcde1234567890     |
|abcde1234567890     |
[SM] Plugin test.smx reloaded successfully.