Add patch for vst3 build fix with old interface

libs/juce-current/patches/04_vst2-interface_pt2.patch

@@ -0,0 +1,78 @@
+diff --git a/modules/juce_audio_plugin_client/VST3/juce_VST3_Wrapper.cpp b/modules/juce_audio_plugin_client/VST3/juce_VST3_Wrapper.cpp
+index 3e63d3372..c09d99fc3 100644
+--- a/modules/juce_audio_plugin_client/VST3/juce_VST3_Wrapper.cpp
++++ b/modules/juce_audio_plugin_client/VST3/juce_VST3_Wrapper.cpp
+@@ -61,10 +61,7 @@
+   #define __cdecl
+  #endif
+ 
+- namespace Vst2
+- {
+- #include "pluginterfaces/vst2.x/vstfxstore.h"
+- }
++ #include <juce_audio_processors/format_types/juce_VSTInterface.h>
+ 
+ #endif
+ 
+@@ -1967,16 +1964,16 @@ public:
+ 
+     bool loadVST2CcnKBlock (const char* data, int size)
+     {
+-        auto* bank = reinterpret_cast<const Vst2::fxBank*> (data);
++        auto* bank = reinterpret_cast<const vst2FxBank*> (data);
+ 
+-        jassert (ByteOrder::bigEndianInt ("CcnK") == htonl ((uint32) bank->chunkMagic));
+-        jassert (ByteOrder::bigEndianInt ("FBCh") == htonl ((uint32) bank->fxMagic));
+-        jassert (htonl ((uint32) bank->version) == 1 || htonl ((uint32) bank->version) == 2);
++        jassert (ByteOrder::bigEndianInt ("CcnK") == htonl ((uint32) bank->magic1));
++        jassert (ByteOrder::bigEndianInt ("FBCh") == htonl ((uint32) bank->magic2));
++        jassert (htonl ((uint32) bank->version1) == 1 || htonl ((uint32) bank->version1) == 2);
+         jassert (JucePlugin_VSTUniqueID == htonl ((uint32) bank->fxID));
+ 
+-        setStateInformation (bank->content.data.chunk,
+-                             jmin ((int) (size - (bank->content.data.chunk - data)),
+-                                   (int) htonl ((uint32) bank->content.data.size)));
++        setStateInformation (bank->chunk,
++                             jmin ((int) (size - (bank->chunk - data)),
++                                   (int) htonl ((uint32) bank->chunkSize)));
+         return true;
+     }
+ 
+@@ -2172,16 +2169,16 @@ public:
+             return status;
+ 
+         const int bankBlockSize = 160;
+-        Vst2::fxBank bank;
++        vst2FxBank bank;
+ 
+         zerostruct (bank);
+-        bank.chunkMagic         = (int32) htonl (ByteOrder::bigEndianInt ("CcnK"));
+-        bank.byteSize           = (int32) htonl (bankBlockSize - 8 + (unsigned int) mem.getSize());
+-        bank.fxMagic            = (int32) htonl (ByteOrder::bigEndianInt ("FBCh"));
+-        bank.version            = (int32) htonl (2);
+-        bank.fxID               = (int32) htonl (JucePlugin_VSTUniqueID);
+-        bank.fxVersion          = (int32) htonl (JucePlugin_VersionCode);
+-        bank.content.data.size  = (int32) htonl ((unsigned int) mem.getSize());
++        bank.magic1     = (int32) htonl (ByteOrder::bigEndianInt ("CcnK"));
++        bank.size       = (int32) htonl (bankBlockSize - 8 + (unsigned int) mem.getSize());
++        bank.magic2     = (int32) htonl (ByteOrder::bigEndianInt ("FBCh"));
++        bank.version1   = (int32) htonl (2);
++        bank.fxID       = (int32) htonl (JucePlugin_VSTUniqueID);
++        bank.version2   = (int32) htonl (JucePlugin_VersionCode);
++        bank.chunkSize  = (int32) htonl ((unsigned int) mem.getSize());
+ 
+         status = state->write (&bank, bankBlockSize);
+ 
+diff --git a/modules/juce_audio_processors/format_types/juce_VSTInterface.h b/modules/juce_audio_processors/format_types/juce_VSTInterface.h
+index 1b3eb7d08..58179be1a 100644
+--- a/modules/juce_audio_processors/format_types/juce_VSTInterface.h
++++ b/modules/juce_audio_processors/format_types/juce_VSTInterface.h
+@@ -506,7 +506,7 @@ enum PresonusExtensionConstants
+ 
+     @tags{Audio}
+ */
+-struct fxBank
++struct vst2FxBank
+ {
+     int32 magic1;
+     int32 size;