Index SymbolDB when generated from address

Otherwise every function will be the same color in the code view widget.

Source/Core/Core/PowerPC/PPCAnalyst.cpp

@@ -367,6 +367,7 @@ void FindFunctions(u32 startAddr, u32 endAddr, PPCSymbolDB* func_db)
 
   // Step 2:
   func_db->FillInCallers();
+  func_db->Index();
 
   int numLeafs = 0, numNice = 0, numUnNice = 0;
   int numTimer = 0, numRFI = 0, numStraightLeaf = 0;