Add error message to 'for inmask' when no topology is present (#1116)

* Add error message for when topology is not present - needed for the
inmask for loop

* 6.29.8. Revision bump for added error message to 'for inmask' when no
topology is present.

src/ForLoop_mask.cpp

@@ -47,7 +47,10 @@ int ForLoop_mask::SetupFor(CpptrajState& State, ArgList& argIn) {
   }
   Topology* top = State.DSL().GetTopByIndex( argIn );
   if (top != 0) currentTop_ = top;
-  if (currentTop_ == 0) return 1;
+  if (currentTop_ == 0) {
+    mprinterr("Error: No topology found for mask for loop.\n");
+    return 1;
+  }
   // Get the variable name
   if (SetupLoopVar( State.DSL(), argIn.GetStringNext() )) return 1;
 

src/Version.h

@@ -12,7 +12,7 @@
  * Whenever a number that precedes <revision> is incremented, all subsequent
  * numbers should be reset to 0.
  */
-#define CPPTRAJ_INTERNAL_VERSION "V6.29.7"
+#define CPPTRAJ_INTERNAL_VERSION "V6.29.8"
 /// PYTRAJ relies on this
 #define CPPTRAJ_VERSION_STRING CPPTRAJ_INTERNAL_VERSION
 #endif