Cleanup: fix typos in comments

Contributed by luzpaz.

Differential Revision: https://developer.blender.org/D7133

source/blender/blenkernel/intern/modifier.c

@@ -677,7 +677,7 @@ Object *modifiers_isDeformedByArmature(Object *ob)
     }
   }
 
-  if (amd) { /* if were still here then return the last armature */
+  if (amd) { /* if we're still here then return the last armature */
     return amd->object;
   }
 
@@ -700,7 +700,7 @@ Object *modifiers_isDeformedByMeshDeform(Object *ob)
     }
   }
 
-  if (mdmd) { /* if were still here then return the last armature */
+  if (mdmd) { /* if we're still here then return the last armature */
     return mdmd->object;
   }
 
@@ -726,7 +726,7 @@ Object *modifiers_isDeformedByLattice(Object *ob)
     }
   }
 
-  if (lmd) { /* if were still here then return the last lattice */
+  if (lmd) { /* if we're still here then return the last lattice */
     return lmd->object;
   }
 
@@ -752,7 +752,7 @@ Object *modifiers_isDeformedByCurve(Object *ob)
     }
   }
 
-  if (cmd) { /* if were still here then return the last curve */
+  if (cmd) { /* if we're still here then return the last curve */
     return cmd->object;
   }