minor issue: graphic line "auto merge" in eeschema

[Dino Ghilardi]

Problem: when you align two consecutive joint lines they are merged into a single line even if the line style is different.

Reproducing the issue: In eeschema draw a first horizontal line, dashed.
Edit the line and change the line style to "solid"
Draw a new line starting from one of the external points of the old line. If you draw it horizontal, eeschema joins the line with the old one, using only one of the settings for the line style, so, for instance, you cannot continue a solid line with a dashed segment if they are aligned.

The same problem arises if you edit a line moving an initial-final point: when it is aligned with an old segment it is joined also when line attributes are different.

Possible solution: do not join two lines in a single one if the line attributes are different.

The same behaviour can be seen for other attributes as the color of the line.

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kicad version (version information from help->about kicad menu):

Application: kicad
Version: (5.1.0-47-gaef369f4a), release build
Libraries:
    wxWidgets 3.0.2
    libcurl/7.52.1 OpenSSL/1.0.2r zlib/1.2.8 libidn2/0.16 libpsl/0.17.0 (+libidn2/0.16) libssh2/1.7.0 nghttp2/1.18.1 librtmp/2.3
Platform: Linux 4.9.0-8-amd64 x86_64, 64 bit, Little endian, wxGTK
Build Info:
    wxWidgets: 3.0.2 (wchar_t,wx containers,compatible with 2.8) GTK+ 2.24
    Boost: 1.69.0
    OpenCASCADE Community Edition: 6.8.0
    Curl: 7.52.1
    Compiler: GCC 6.3.0 with C++ ABI 1010

Build settings:
    USE_WX_GRAPHICS_CONTEXT=OFF
    USE_WX_OVERLAY=OFF
    KICAD_SCRIPTING=ON
    KICAD_SCRIPTING_MODULES=ON
    KICAD_SCRIPTING_PYTHON3=OFF
    KICAD_SCRIPTING_WXPYTHON=ON
    KICAD_SCRIPTING_WXPYTHON_PHOENIX=OFF
    KICAD_SCRIPTING_ACTION_MENU=ON
    BUILD_GITHUB_PLUGIN=ON
    KICAD_USE_OCE=ON
    KICAD_USE_OCC=OFF
    KICAD_SPICE=ON

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Cheers,
Dino.

[KiCad Janitor (kicad-janitor)]

Fixed in revision 2447933b54a290ba4250ee109d12fcce852fafc5
https://git.launchpad.net/kicad/patch/?id=2447933b54a290ba4250ee109d12fcce852fafc5