[PICA] Fix more shader bugs

include/PICA/regs.hpp

@@ -59,6 +59,7 @@ namespace PICAInternalRegs {
 		VertexIntUniform2 = 0x2B3,
 		VertexIntUniform3 = 0x2B4,
 
+		VertexShaderEntrypoint = 0x2BA,
 		VertexShaderTransferEnd = 0x2BF,
 		VertexFloatUniformIndex = 0x2C0,
 		VertexFloatUniformData0 = 0x2C1,

include/PICA/shader.hpp

@@ -150,7 +150,8 @@ class PICAShader {
 public:
 	std::array<u32, 512> loadedShader; // Currently loaded & active shader
 	std::array<u32, 512> bufferedShader; // Shader to be transferred when the SH_CODETRANSFER_END reg gets written to
-	
+
+	u32 entrypoint = 0; // Initial shader PC
 	u32 boolUniform;
 	std::array<OpenGL::Vector<u8, 4>, 4> intUniforms;
 	std::array<vec4f, 96> floatUniforms;