addStrokeAdjustHint(): fix crash in out-of-memory situation.
Fixes https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=25411 ``` #0 0xf7ef8f19 in [vdso] #1 0xf7ccdd08 in gsignal (/lib32/libc.so.6+0x2bd08) #2 0xf7ccf206 in abort (/lib32/libc.so.6+0x2d206) #3 0xbdb9c2e in grealloc(void*, unsigned int, bool) gdal/poppler/goo/gmem.h:85:5 #4 0xbdd9e11 in greallocn(void*, int, int, bool, bool) gdal/poppler/goo/gmem.h:171:12 #5 0xc012373 in SplashPath::addStrokeAdjustHint(int, int, int, int) gdal/poppler/splash/SplashPath.cc:211:35 #6 0xbfd156f in Splash::makeStrokePath(SplashPath*, double, bool) gdal/poppler/splash/Splash.cc:5987:34 #7 0xbfcaec2 in Splash::strokeWide(SplashPath*, double) gdal/poppler/splash/Splash.cc:2028:13 #8 0xbfc8a4d in Splash::stroke(SplashPath*) /src/gdal/poppler/splash/Splash.cc ```
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#4416962
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build |
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#4416967
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build_android |
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#4416963
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build_clang_libcpp |
00:04:08
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#4416966
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build_clazy |
00:02:07
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#4416965
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build_mingw64_fedora |
00:03:14
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#4416964
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build_ubuntu_16_04 |
00:02:40
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#4416961
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clang_format |
00:01:05
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