Inconsistent font rendering/sizing

[coderobe]

The LCUI example helloworld shows inconsistent font sizes when updating the text.

Reproduction Steps:

1. Build current develop branch
2. Build examples in test/
3. Run the built helloworld
4. Repeatedly click the Change button

Screenshots and GIFs

LCUI version: branch develop commit 402bc031b424923b89feea390a84a2c15a9b1fdb
OS and version: Linux 4.15.1
Build tools: gcc (GCC) 7.3.0
Libraries (taken from LCUI_LIBS in the generated Makefile):

• libxml2 2.9.7
• freetype 2.9
• libx11 1.6.5
• libpng 1.6.34
• zlib 1.2.11
• libjpeg-turbo 1.5.3

[lc-soft]

Fixed.

9995b23#diff-e0a052a143a1fd2418b69fd5fcf24ee2R58

LCUI_TextStyle::has_pixel_size is not initialized before it is used.

void TextStyle_Init( LCUI_TextStyle data )
{
	data->has_style = FALSE;
	data->has_weight = FALSE;
	data->has_family = FALSE;
+	data->has_pixel_size = FALSE;
	data->has_back_color = FALSE;
	data->has_fore_color = FALSE;