use-of-uninitialized-value in nsvg__minf() via nsvg__parseScale()

[invd]

MemorySanitizer reports use-of-uninitialized-value.

Shortened report, obtainable with -fsanitize=memory -fsanitize-memory-track-origins:

==12522==WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0x505817 in nsvg__minf /nanosvg/src/./nanosvg.h:228:64
    #1 0x5025f5 in nsvg__curveBounds /nanosvg/src/./nanosvg.h:573:14
    #2 0x4f6fb5 in nsvg__addPath /nanosvg/src/./nanosvg.h:1069:3
    #3 0x4c1510 in nsvg__parseLine /nanosvg/src/./nanosvg.h:2496:2
    #4 0x4a1b3c in nsvg__startElement /nanosvg/src/./nanosvg.h:2743:3
    #5 0x49fb70 in nsvg__parseElement /nanosvg/src/./nanosvg.h:321:3
    #6 0x49bc73 in nsvg__parseXML /nanosvg/src/./nanosvg.h:345:4
    #7 0x4a0472 in nsvgParse /nanosvg/src/./nanosvg.h:2928:2
    #8 0x4a9c90 in nsvgParseFromFile /nanosvg/src/./nanosvg.h:2958:10
    #9 0x4ac029 in main /nanosvg/src/nanosvg_msan_example1.c:10:24
[...]
  Uninitialized value was stored to memory at
    #0 0x4e1063 in nsvg__xformSetScale /nanosvg/src/./nanosvg.h:472
    #1 0x4db131 in nsvg__parseScale /nanosvg/src/./nanosvg.h:1560:2
    #2 0x4caad2 in nsvg__parseTransform /nanosvg/src/./nanosvg.h:1628:10
    #3 0x4c98f4 in nsvg__parseAttr /nanosvg/src/./nanosvg.h:1797:3
    #4 0x4c0102 in nsvg__parseLine /nanosvg/src/./nanosvg.h:2483:8
    #5 0x4a1b3c in nsvg__startElement /nanosvg/src/./nanosvg.h:2743:3
    #6 0x49fb70 in nsvg__parseElement /nanosvg/src/./nanosvg.h:321:3
    #7 0x49bc73 in nsvg__parseXML /nanosvg/src/./nanosvg.h:345:4
    #8 0x4a0472 in nsvgParse /nanosvg/src/./nanosvg.h:2928:2
    #9 0x4a9c90 in nsvgParseFromFile /nanosvg/src/./nanosvg.h:2958:10
    #10 0x4ac029 in main /nanosvg/src/nanosvg_msan_example1.c:10:24

  Uninitialized value was created by an allocation of 'args' in the stack frame of function 'nsvg__parseScale'
    #0 0x4dabb0 in nsvg__parseScale /nanosvg/src/./nanosvg.h:1554

Example input: msan_1.svg.zip

Mentioning @memononen, @oehhar, @fvogelnew1 for visibility.