JitCache: Return a pointer in GetBlockFromStartAddress.

Source/Core/Core/PowerPC/JitInterface.cpp

@@ -168,34 +168,31 @@ int GetHostCode(u32* address, const u8** code, u32* code_size)
     return 1;
   }
 
-  int block_num = g_jit->GetBlockCache()->GetBlockNumberFromStartAddress(*address, MSR);
-  if (block_num < 0)
+  JitBlock* block = g_jit->GetBlockCache()->GetBlockFromStartAddress(*address, MSR);
+  if (!block)
   {
     for (int i = 0; i < 500; i++)
     {
-      block_num = g_jit->GetBlockCache()->GetBlockNumberFromStartAddress(*address - 4 * i, MSR);
-      if (block_num >= 0)
+      block = g_jit->GetBlockCache()->GetBlockFromStartAddress(*address - 4 * i, MSR);
+      if (block)
         break;
     }
 
-    if (block_num >= 0)
+    if (block)
     {
-      JitBlock* block = g_jit->GetBlockCache()->GetBlock(block_num);
       if (!(block->effectiveAddress <= *address &&
             block->originalSize + block->effectiveAddress >= *address))
-        block_num = -1;
+        block = nullptr;
     }
 
     // Do not merge this "if" with the above - block_num changes inside it.
-    if (block_num < 0)
+    if (!block)
     {
       *code_size = 0;
       return 2;
     }
   }
 
-  JitBlock* block = g_jit->GetBlockCache()->GetBlock(block_num);
-
   *code = block->checkedEntry;
   *code_size = block->codeSize;
   *address = block->effectiveAddress;