Fix mixed line endings

src/Mod/Mesh/App/Core/MeshIO.cpp

@@ -250,7 +250,7 @@ bool MeshInput::LoadSTL (std::istream &rstrIn)
     // the file size has only 134 bytes in this case. On the other hand we must overread the first 80 bytes
     // because it can happen that the file is binary but contains one of these keywords.
     std::streambuf* buf = rstrIn.rdbuf();
-    if (!buf)
+    if (!buf)
         return false;
     buf->pubseekoff(80, std::ios::beg, std::ios::in);
     uint32_t ulCt, ulBytes=50;