Fix compilation with --enable-gcc-warnings and -O1
optimization level. * configure.in: If --enable-gcc-warnings, disable -Wunsafe-loop-optimizations for -O1 optimization level. * src/doprnt.c (doprnt): Change type of tem to int, initialize to avoid compiler warning. Add eassert. * src/search.c (simple_search): Initialize match_byte to avoid compiler warning. Add eassert.
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