Fix LLMediaEntry unit tests and copy constructor for transparent_background.

Add transparent_background field to DEFAULT_MEDIA_ENTRY, EMPTY_MEDIA_ENTRY,
and PARTIAL_MEDIA_ENTRY tests.
Fix copy constructor missing mTransparentBackground.

Author: shadoskill

indra/llprimitive/llmediaentry.cpp

@@ -127,6 +127,9 @@ LLMediaEntry::LLMediaEntry(const LLMediaEntry &rhs) :
     // "permissions" fields
     mPermsInteract = rhs.mPermsInteract;
     mPermsControl = rhs.mPermsControl;
+
+    // "display" fields
+    mTransparentBackground = rhs.mTransparentBackground;
 }
 
 LLMediaEntry::~LLMediaEntry()

indra/llprimitive/tests/llmediaentry_test.cpp

@@ -62,6 +62,8 @@
  <integer>7</integer>\n\
  <key>perms_interact</key>\n\
  <integer>7</integer>\n\
+ <key>transparent_background</key>\n\
+ <boolean>0</boolean>\n\
  <key>whitelist_enable</key>\n\
  <boolean>0</boolean>\n\
  <key>width_pixels</key>\n\
@@ -95,6 +97,8 @@
  <integer>0</integer>\n\
  <key>perms_interact</key>\n\
  <integer>0</integer>\n\
+ <key>transparent_background</key>\n\
+ <boolean>0</boolean>\n\
  <key>whitelist_enable</key>\n\
  <boolean>0</boolean>\n\
  <key>width_pixels</key>\n\
@@ -128,6 +132,8 @@
  <integer>0</integer>\n\
  <key>perms_interact</key>\n\
  <integer>0</integer>\n\
+ <key>transparent_background</key>\n\
+ <boolean>0</boolean>\n\
  <key>whitelist_enable</key>\n\
  <boolean>0</boolean>\n\
  <key>width_pixels</key>\n\