Update DPF, fix crash on close if host never resizes UI

Signed-off-by: falkTX <falktx@falktx.com>

dpf

@@ -1 +1 @@
-Subproject commit df6d7f50377266b1869c6c590ff7412d2241856e
+Subproject commit e44a908375610d7f46b507532b4602c9f89f085a

plugins/ProM/DistrhoUIProM.cpp

@@ -96,6 +96,9 @@ DistrhoUIProM::DistrhoUIProM()
 
 DistrhoUIProM::~DistrhoUIProM()
 {
+    if (fPM == nullptr)
+        return;
+
     if (DistrhoPluginProM* const dspPtr = (DistrhoPluginProM*)getPluginInstancePointer())
     {
         const MutexLocker csm(dspPtr->fMutex);