PH_Power_Interval.c: fix typo in iteration export title

prism/src/hybrid/PH_PowerInterval.cc

@@ -182,7 +182,7 @@ jint flags
 
 	std::unique_ptr<ExportIterations> iterationExport;
 	if (PH_GetFlagExportIterations()) {
-		iterationExport.reset(new ExportIterations("PH_Power"));
+		iterationExport.reset(new ExportIterations("PH_Power_Interval"));
 		PH_PrintToMainLog(env, "Exporting iterations to %s\n", iterationExport->getFileName().c_str());
 		iterationExport->exportVector(soln_below, n, 0);
 		iterationExport->exportVector(soln_above, n, 1);