Fix edge case in unmangled function symbols

Source/Core/Core/PowerPC/PPCSymbolDB.cpp

@@ -424,15 +424,25 @@ bool PPCSymbolDB::LoadMap(const Core::CPUThreadGuard& guard, const std::string&
       {
         // If it does, the symbol is likely demangled, so look for the end of the name
         size_t nameEndOffset = parenthesisOffset;
-        while (processed_name[nameEndOffset] != ')')
+        int depth = 0;  // Current parenthesis depth
+        while (true)
         {
+          char curChar = processed_name[nameEndOffset];
+          if (curChar == '(')
+            depth++;
+          else if (curChar == ')')
+            depth--;
+
           nameEndOffset++;
+
+          if (depth == 0)
+            break;
         }
 
         nameEndOffset++;  // Advance past the ending parenthesis
 
         // If the name ends with const, advance past it
-        if (processed_name.find(") const") != std::string::npos)
+        if (processed_name.find(") const ") != std::string::npos)
         {
           nameEndOffset += 6;
         }