Fix potential memory leak in text buffer (STR # 3035).

Also small code formatting, remove one redundant statement.


git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@10083 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

src/Fl_Text_Buffer.cxx

@@ -139,7 +139,7 @@ Fl_Text_Buffer::~Fl_Text_Buffer()
     delete[]mModifyProcs;
     delete[]mCbArgs;
   }
-  if (mNPredeleteProcs != 0) {
+  if (mNPredeleteProcs > 0) {
     delete[] mPredeleteProcs;
     delete[] mPredeleteCbArgs;
   }
@@ -735,7 +735,7 @@ void Fl_Text_Buffer::add_predelete_callback(Fl_Text_Predelete_Cb bufPreDeleteCB,
     newPreDeleteProcs[i + 1] = mPredeleteProcs[i];
     newCBArgs[i + 1] = mPredeleteCbArgs[i];
   }
-  if (!mNPredeleteProcs != 0) {
+  if (mNPredeleteProcs > 0) {
     delete[] mPredeleteProcs;
     delete[] mPredeleteCbArgs;
   }
@@ -767,19 +767,16 @@ void Fl_Text_Buffer::remove_predelete_callback(Fl_Text_Predelete_Cb bufPreDelete
     return;
   }
   
-  /* Allocate new lists for remaining callback procs and args (if
+  /* Allocate new lists for remaining callback procs and args (if any are left) */
-   any are left) */
   mNPredeleteProcs--;
   if (mNPredeleteProcs == 0) {
-    mNPredeleteProcs = 0;
     delete[]mPredeleteProcs;
     mPredeleteProcs = NULL;
     delete[]mPredeleteCbArgs;
     mPredeleteCbArgs = NULL;
     return;
   }
-  Fl_Text_Predelete_Cb *newPreDeleteProcs =
+  Fl_Text_Predelete_Cb *newPreDeleteProcs = new Fl_Text_Predelete_Cb[mNPredeleteProcs];
-  new Fl_Text_Predelete_Cb[mNPredeleteProcs];
   void **newCBArgs = new void *[mNPredeleteProcs];
   
   /* copy out the remaining members and free the old lists */