Merge pull request opensim-org#1110 from opensim-org/tkuchida-correctReadme

Add return to README

Author: tkuchida

OpenSim/Tests/README/testREADME.cpp

@@ -119,4 +119,6 @@ int main() {
     getchar();
 #endif
     manager.integrate(state);
+
+    return 0;
 };

README.md

@@ -94,6 +94,8 @@ int main() {
     Manager manager(model, integrator);
     manager.setInitialTime(0); manager.setFinalTime(10.0);
     manager.integrate(state);
+    
+    return 0;
 };
 ```