Needless casts sal_uInt8 -> sal_Int8 -> sal_uInt8

Change-Id: I2d55c4e088cf17183ededa0719b3bdcba5baba23
This has only converted the condition of ?: to long

...not the resulting value, since 9ad0aa90fa5cf8c3b3e6a42bd9a0172b4cf75a47
"#80304# More improvements for vertial writing," but seems unnecessary anyway.

Change-Id: Ifb86e51970cd32a1933541c75fe5d1d8f8b9f05b
Fix bad patch

...and whoever had the bad idea to make the downloaded GLM_TARBALL
bae83fa5dc7f081768daace6e199adc3-glm-0.9.4.6-libreoffice.zip to already be
patched with that broken patch (external/glm/Wshadow-unix.patch or
external/glm/Wshadow-windows.patch or whatever?) instead of applying locally via
gb_UnpackedTarball_add_patches...

Change-Id: I0053346f626cc3af42f7ea82a7a26c8b47876a98