Fixed UBSan warnings about left shifts into the sign bit #3207
+12
−12
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Added casts to unsigned to make it well-defined.
Example warnings:
libsrc/ncx.c:4054:31: runtime error: left shift of 255 by 56 places cannot be represented in type 'ix_int64' (aka 'long long')
libsrc/ncx.c:2087:24: runtime error: left shift of 255 by 24 places cannot be represented in type 'int'