Trim whitespace string from XISF

src/imageinfodata.cpp

@@ -30,6 +30,7 @@ FITSRecord::FITSRecord(const LibXISF::FITSKeyword &record)
         string.chop(1);
         string.remove(0, 1);
     }
+    string = string.trimmed();
     bool isint;
     bool isdouble;
     double vald = string.toDouble(&isdouble);