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example, tests: address compiler warnings
Fix or silence all C compiler warnings discovered with (or without) `PICKY_COMPILER=ON` (in CMake). This means all warnings showing up in CI (gcc, clang, MSVS 2013/2015), in local tests on macOS (clang 14) and Windows cross-builds using gcc (12) and llvm/clang (14/15). Also fix the expression `nread -= nread` in `sftp_RW_nonblock.c`. Cherry-picked from: #846 Closes #861
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@ -46,7 +46,7 @@ const char *username = "username";
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int main(int argc, char *argv[])
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{
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unsigned long hostaddr;
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uint32_t hostaddr;
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libssh2_socket_t sock = LIBSSH2_INVALID_SOCKET;
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int i, rc;
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struct sockaddr_in sin;
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@ -126,7 +126,8 @@ int main(int argc, char *argv[])
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fprintf(stderr, "\n");
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/* check what authentication methods are available */
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userauthlist = libssh2_userauth_list(session, username, strlen(username));
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userauthlist = libssh2_userauth_list(session, username,
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(unsigned int)strlen(username));
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fprintf(stderr, "Authentication methods: %s\n", userauthlist);
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if(strstr(userauthlist, "publickey") == NULL) {
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fprintf(stderr, "\"publickey\" authentication is not supported\n");
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