Problems when updating strings starting with +

[Tlapi]

Latest release 2.2.4 has broken our build, when updating phone numbers like +420111222333, it treats this string as if increment is wanted.

I think, there should be optional parameter to enable the increment / decrement function and has it disabled by default.

[hareku]

The patch #56 causes SQL syntax error if a column is not int type and its new value starts with a operator.

@WalterWoshid
Would you have any ideas to deal with this problem?

[WalterWoshid]

@Tlapi
@hareku
#58