Missing semi-colons I noticed when running on Skylake.

src/hydro/Gadget2/hydro_iact.h

@@ -151,7 +151,7 @@ __attribute__((always_inline)) INLINE static void runner_iact_vec_density(
   for (k = 0; k < 3; k++)
     dx[k].v = vec_set(Dx[0 + k], Dx[3 + k], Dx[6 + k], Dx[9 + k]);
 #else
-  error("Unknown vector size.")
+  error("Unknown vector size.");
 #endif
 
   /* Get the radius and inverse radius. */
@@ -318,7 +318,7 @@ runner_iact_nonsym_vec_density(float *R2, float *Dx, float *Hi, float *Hj,
   for (k = 0; k < 3; k++)
     dx[k].v = vec_set(Dx[0 + k], Dx[3 + k], Dx[6 + k], Dx[9 + k]);
 #else
-  error("Unknown vector size.")
+  error("Unknown vector size.");
 #endif
 
   /* Get the radius and inverse radius. */
@@ -845,7 +845,7 @@ __attribute__((always_inline)) INLINE static void runner_iact_vec_force(
               vec_set(pj[0]->force.balsara, pj[1]->force.balsara,
                       pj[2]->force.balsara, pj[3]->force.balsara);
 #else
-  error("Unknown vector size.")
+  error("Unknown vector size.");
 #endif
 
   /* Get the radius and inverse radius. */
@@ -1124,7 +1124,7 @@ __attribute__((always_inline)) INLINE static void runner_iact_nonsym_vec_force(
               vec_set(pj[0]->force.balsara, pj[1]->force.balsara,
                       pj[2]->force.balsara, pj[3]->force.balsara);
 #else
-  error("Unknown vector size.")
+  error("Unknown vector size.");
 #endif
 
   /* Get the radius and inverse radius. */