small change

Author: mrodrig6

src/forward_solver/m_imr_fd.m

@@ -56,8 +56,8 @@
     Szero           = init_stress;
 
     % time span options
-    tspan = tspan_opts;
-    tfin = tspan(end);
+    tspan           = tspan_opts;
+    tfin            = tspan(end);
 
     % output options
     dimensionalout  = out_opts(1);