validate_nmmpmat broken

[janssenhenning]

validate_nmmpmat thinks a completely fine mmpmat is broken (It thinks a negative element not on the diagonal is actually on the diagonal).

For reference:

0.9907556309755    -0.0000000000000     0.0002048894567    -0.0000361273993    -0.0010011912548     0.0003644034368    -0.0003398363314
     0.0001962043484     0.0004184671113    -0.0003511347013     0.0000576882419    -0.0000687500194    -0.0003113085253     0.0005392008958
     0.0002048894567     0.0000361273993     0.9891233299310    -0.0000000000000    -0.0003179049980     0.0000560553310    -0.0006909750415
     0.0002514934955    -0.0003935419412     0.0002272112948     0.0000824154988    -0.0000691551997     0.0000576926863    -0.0000687553967
    -0.0010011912548    -0.0003644034368    -0.0003179049980    -0.0000560553310     0.9916535865630     0.0000000000000    -0.0004028194591
     0.0000710280120    -0.0011476749278     0.0004177194512    -0.0003935541763     0.0002272183286     0.0004184660833    -0.0003511338264
    -0.0003398363314    -0.0001962043484    -0.0006909750415    -0.0002514934955    -0.0004028194591    -0.0000710280120     0.9898854083391
     0.0000000000000    -0.0004028111370     0.0000710265332    -0.0006909739179     0.0002514930826    -0.0003398349087     0.0001962035728
     0.0004184671113     0.0003511347013    -0.0003935419412    -0.0002272112948    -0.0011476749278    -0.0004177194512    -0.0004028111370
    -0.0000710265332     0.9916535874154    -0.0000000000000    -0.0003179086904     0.0000560559875    -0.0010011859333     0.0003644014831
     0.0000576882419     0.0000687500194     0.0000824154988     0.0000691551997    -0.0003935541763    -0.0002272183286    -0.0006909739179
    -0.0002514930826    -0.0003179086904    -0.0000560559875     0.9891233311464    -0.0000000000000     0.0002049028181    -0.0000361297769
    -0.0003113085253    -0.0005392008958     0.0000576926863     0.0000687553967     0.0004184660833     0.0003511338264    -0.0003398349087
    -0.0001962035728    -0.0010011859333    -0.0003644014831     0.0002049028181     0.0000361297769     0.9907556255140     0.0000000000000
     0.3379221511060    -0.0000000000000     0.3688647472021    -0.0650407342032     0.1096535510850    -0.0399106080703    -0.1192407294700
     0.0688435699516    -0.0906753568609     0.0760854554711     0.0486221614704    -0.0579455174541     0.0769609015452    -0.1332998236474
     0.3688647472021     0.0650407342032     0.4929169673635     0.0000000000000     0.2859576634634    -0.0504219769857    -0.0007231486045
     0.0002632978522    -0.0832062106398     0.0480390526968     0.0006171368347    -0.0005177372601     0.0486216945239    -0.0579449420778
     0.1096535510850     0.0399106080703     0.2859576634634     0.0504219769857     0.4019891403577    -0.0000000000000     0.3141404071897
    -0.0553913675733     0.0873273533334    -0.0317846408193    -0.0832066141528     0.0480392931632    -0.0906756792209     0.0760857341635
    -0.1192407294700    -0.0688435699516    -0.0007231486045    -0.0002632978522     0.3141404071897     0.0553913675733     0.4919142779375
     0.0000000000000     0.3141393535378    -0.0553911792004    -0.0007231618951     0.0002633029195    -0.1192400231383     0.0688431522061
    -0.0906753568609    -0.0760854554711    -0.0832062106398    -0.0480390526968     0.0873273533334     0.0317846408193     0.3141393535378
     0.0553911792004     0.4019887148110     0.0000000000000     0.2859586259080    -0.0504221488659     0.1096545477629    -0.0399109778759
     0.0486221614704     0.0579455174541     0.0006171368347     0.0005177372601    -0.0832066141528    -0.0480392931632    -0.0007231618951
    -0.0002633029195     0.2859586259080     0.0504221488659     0.4929170453269     0.0000000000000     0.3688636472000    -0.0650405377722
     0.0769609015452     0.1332998236474     0.0486216945239     0.0579449420778    -0.0906756792209    -0.0760857341635    -0.1192400231383
    -0.0688431522061     0.1096545477629     0.0399109778759     0.3688636472000     0.0650405377722     0.3379197726207     0.0000000000000