[Bug] Shader preprocessor corrupts source files that contains floating point numbers

[bnoazx005]

Bug report

The shader preprocessor can't correctly process any source with long floating point numbers.

Environment

Win 10 (x64) / Visual Studio 2017 / TDEngine2-v0.4

Steps to reproduce the issue

1. Try to compile shader source which contains any floating point number that's length is greater than 3 digit.

What's the expected result?

The preprocessor should correctly process any source with floaing point numbers in it.

What's the actual result?

The shader preprocessor corrupts a source file if it contains any floating point number that's length is greater than 3 digits after point.

[bnoazx005]

Fixed in d810d7d4c1cd204b92c78b8b78060253da40d3e4