Make certain not to try and allocate a zero sized array.

git-svn-id: http://svn.cactuscode.org/arrangements/CactusNumerical/MoL/trunk@117 578cdeb0-5ea1-4b81-8215-5a3b8777ee0b

1 files changed, 11 insertions, 8 deletions

diff --git a/src/InitialCopy.c b/src/InitialCopy.c
index 7948006..5b72393 100644
--- a/src/InitialCopy.c
+++ b/src/InitialCopy.c
@@ -148,19 +148,22 @@ void MoL_InitialCopy(CCTK_ARGUMENTS)
     
   /* Set up the array sizes */
 
-  if (!ArrayScratchSizes)
+  if (MoLNumEvolvedArrayVariables)
   {
-    ArrayScratchSizes = (CCTK_INT *)malloc(MoLNumEvolvedArrayVariables * sizeof(CCTK_INT));
     if (!ArrayScratchSizes)
     {
-      CCTK_WARN(0, "Failed to allocate the array scratch sizes array.");
-    }
-    for (var = 0; var < MoLNumEvolvedArrayVariables; var++)
-    {
-      ArrayScratchSizes[var] = -1;
+      ArrayScratchSizes = (CCTK_INT *)malloc(MoLNumEvolvedArrayVariables * sizeof(CCTK_INT));
+      if (!ArrayScratchSizes)
+      {
+        CCTK_WARN(0, "Failed to allocate the array scratch sizes array.");
+      }
+      for (var = 0; var < MoLNumEvolvedArrayVariables; var++)
+      {
+        ArrayScratchSizes[var] = -1;
+      }
     }
   }
-
+  
   totalarrayscratchsize = 0;
 
   for (var = 0; var < MoLNumEvolvedArrayVariables; var++)