qa_eeschema: fix a crash due to LIB_PIN ctor that was using default config values,

but in QA tests, we do not have config values available.

eeschema/eeschema.cpp

@@ -163,6 +163,13 @@ PGM_BASE& Pgm()
     return *process;
 }
 
+// Similar to PGM_BASE& Pgm(), but return nullptr when a *.ki_face is run from
+// a python script or something else.
+PGM_BASE* PgmOrNull()
+{
+    return process;
+}
+
 
 bool IFACE::OnKifaceStart( PGM_BASE* aProgram, int aCtlBits )
 {

eeschema/lib_pin.cpp

@@ -153,10 +153,23 @@ LIB_PIN::LIB_PIN( LIB_PART* aParent )
     m_attributes   = 0;                               // bit 0 != 0: pin invisible
     m_width        = 0;
 
-    LIBEDIT_SETTINGS* settings = Pgm().GetSettingsManager().GetAppSettings<LIBEDIT_SETTINGS>();
+    // Use the application settings for pin sizes if exists.
+    // pgm can be nullptr when running a shared lib from a script, not from a kicad appl
+    PGM_BASE* pgm  = PgmOrNull();
+
+    if( pgm )
+    {
+        LIBEDIT_SETTINGS* settings = pgm->GetSettingsManager().GetAppSettings<LIBEDIT_SETTINGS>();
         m_length       = Mils2iu( settings->m_Defaults.pin_length );
         m_numTextSize  = Mils2iu( settings->m_Defaults.pin_num_size );
         m_nameTextSize = Mils2iu( settings->m_Defaults.pin_name_size );
+    }
+    else    // Use hardcoded eeschema defaults: libedit settings are not existing.
+    {
+        m_length       = Mils2iu( 100 );
+        m_numTextSize  = Mils2iu( 50 );
+        m_nameTextSize = Mils2iu( 50 );
+    }
 }
 
 

qa/eeschema/mocks_eeschema.cpp

@@ -113,6 +113,14 @@ PGM_BASE& Pgm()
     return program;
 }
 
+// Similar to PGM_BASE& Pgm(), but return nullptr when a *.ki_face is run from
+// a python script or something else.
+// Therefore here return always nullptr
+PGM_BASE* PgmOrNull()
+{
+    return nullptr;
+}
+
 
 KIFACE_I& Kiface()
 {