change defined() to 0/1 check

[CrackedPixel]

There were a few places using the older if defined(), it seems this behavior was changed to use 0/1 values and broke some things

this can be double checked with grep:

grep -ir "defined(SUPPORT_"

there are still a few places but i think they all are appropriate

grep -ir "defined(SUPPORT_"
examples/core/raygui.h:#if defined(SUPPORT_SCROLLBAR_KEY_INPUT)
examples/models/raygui.h:#if defined(SUPPORT_SCROLLBAR_KEY_INPUT)
examples/shaders/raygui.h:#if defined(SUPPORT_SCROLLBAR_KEY_INPUT)
examples/shapes/shapes_rectangle_advanced.c:#if defined(SUPPORT_QUADS_DRAW_MODE)
examples/shapes/raygui.h:#if defined(SUPPORT_SCROLLBAR_KEY_INPUT)
src/platforms/rcore_drm.c:#if defined(SUPPORT_DRM_CACHE)
src/platforms/rcore_drm.c:#if defined(SUPPORT_DRM_CACHE)
src/platforms/rcore_drm.c:#if defined(SUPPORT_DRM_CACHE)
src/platforms/rcore_drm.c:#if defined(SUPPORT_DRM_CACHE)
src/rtext.c:#if defined(SUPPORT_COMPRESSED_FONT_ATLAS)
src/rtext.c:#if defined(SUPPORT_COMPRESSED_FONT_ATLAS)
src/rtext.c:#if defined(SUPPORT_COMPRESSED_FONT_ATLAS)
src/rtext.c:#if defined(SUPPORT_FONT_DATA_COPY)
src/rtext.c:#if defined(SUPPORT_UNORDERED_CHARSET)
tools/rexm/rexm.c:#if defined(SUPPORT_LOG_INFO) //&& defined(_DEBUG)

[raysan5]

@CrackedPixel thanks! I also sent a PR to fixing it... but I missed some of those flags...