Coverity: Suppress false-positives

src/Base/FileInfo.cpp

@@ -188,6 +188,7 @@ std::string FileInfo::getTempFileName(const char* FileName, const char* Path)
         buf += "/fileXXXXXX";
     }
 
+    /* coverity[secure_temp] mkstemp uses 0600 as the mode and is safe */
     int id = mkstemp(const_cast<char*>(buf.c_str()));
     if (id > -1) {
         FILE* file = fdopen(id, "w");

src/Base/Stream.cpp

@@ -783,6 +783,7 @@ Streambuf::int_type Streambuf::uflow()
 
 Streambuf::int_type Streambuf::pbackfail( int_type ch )
 {
+    /* coverity[negative_returns] _cur is an iterator */
     if (_cur == _beg || (ch != traits_type::eof() && ch != _cur[-1]))
         return traits_type::eof();