removed usage of emptyString from dmake

Author: firewave

tools/dmake/dmake.cpp

@@ -570,7 +570,7 @@ int main(int argc, char **argv)
     fout << "# To compile with rules, use 'make HAVE_RULES=yes'\n";
     makeConditionalVariable(fout, "HAVE_RULES", "");
 
-    makeMatchcompiler(fout, emptyString, emptyString);
+    makeMatchcompiler(fout, "", "");
 
     // avoid undefined variable
     fout << "ifndef CPPFLAGS\n"
@@ -839,7 +839,7 @@ int main(int argc, char **argv)
     compilefiles(fout, libfiles_prio, "${INCLUDE_FOR_LIB}");
     compilefiles(fout, clifiles, "${INCLUDE_FOR_CLI}");
     compilefiles(fout, testfiles, "${INCLUDE_FOR_TEST}");
-    compilefiles(fout, extfiles, emptyString);
+    compilefiles(fout, extfiles, "");
     compilefiles(fout, toolsfiles, "${INCLUDE_FOR_LIB}");
 
     write_ossfuzz_makefile(libfiles_prio, extfiles);