libswscale/swscale.c:3131: error: Null Dereference
  pointer `vec` last assigned on line 3129 could be null and is dereferenced at line 3131, column 5.

libswscale/swscale.c:3126:1: start of procedure sws_getConstVec()
3124. }
3125. 
3126. SwsVector *sws_getConstVec(double c, int length){
      ^
3127.     int i;
3128.     double *coeff= av_malloc(length*sizeof(double));

libswscale/swscale.c:3128:5: 
3126. SwsVector *sws_getConstVec(double c, int length){
3127.     int i;
3128.     double *coeff= av_malloc(length*sizeof(double));
          ^
3129.     SwsVector *vec= av_malloc(sizeof(SwsVector));
3130. 

libavutil/mem.c:47:1: start of procedure av_malloc()
  45.    linker will do it automatically. */
  46. 
  47. void *av_malloc(unsigned int size)
      ^
  48. {
  49.     void *ptr = NULL;

libavutil/mem.c:49:5: 
  47. void *av_malloc(unsigned int size)
  48. {
  49.     void *ptr = NULL;
          ^
  50. #if CONFIG_MEMALIGN_HACK
  51.     long diff;

libavutil/mem.c:55:8: Taking false branch
  53. 
  54.     /* let's disallow possible ambiguous cases */
  55.     if(size > (INT_MAX-16) )
             ^
  56.         return NULL;
  57. 

libavutil/mem.c:66:9: Taking false branch
  64.     ((char*)ptr)[-1]= diff;
  65. #elif HAVE_POSIX_MEMALIGN
  66.     if (posix_memalign(&ptr,16,size))
              ^
  67.         ptr = NULL;
  68. #elif HAVE_MEMALIGN

libavutil/mem.c:99:5: 
   97.     ptr = malloc(size);
   98. #endif
   99.     return ptr;
           ^
  100. }
  101. 

libavutil/mem.c:100:1: return from a call to av_malloc
   98. #endif
   99.     return ptr;
  100. }
       ^
  101. 
  102. void *av_realloc(void *ptr, unsigned int size)

libswscale/swscale.c:3129:5: 
3127.     int i;
3128.     double *coeff= av_malloc(length*sizeof(double));
3129.     SwsVector *vec= av_malloc(sizeof(SwsVector));
          ^
3130. 
3131.     vec->coeff= coeff;

libavutil/mem.c:47:1: start of procedure av_malloc()
  45.    linker will do it automatically. */
  46. 
  47. void *av_malloc(unsigned int size)
      ^
  48. {
  49.     void *ptr = NULL;

libavutil/mem.c:49:5: 
  47. void *av_malloc(unsigned int size)
  48. {
  49.     void *ptr = NULL;
          ^
  50. #if CONFIG_MEMALIGN_HACK
  51.     long diff;

libavutil/mem.c:55:8: Taking false branch
  53. 
  54.     /* let's disallow possible ambiguous cases */
  55.     if(size > (INT_MAX-16) )
             ^
  56.         return NULL;
  57. 

libavutil/mem.c:66:9: Taking true branch
  64.     ((char*)ptr)[-1]= diff;
  65. #elif HAVE_POSIX_MEMALIGN
  66.     if (posix_memalign(&ptr,16,size))
              ^
  67.         ptr = NULL;
  68. #elif HAVE_MEMALIGN

libavutil/mem.c:67:9: 
  65. #elif HAVE_POSIX_MEMALIGN
  66.     if (posix_memalign(&ptr,16,size))
  67.         ptr = NULL;
              ^
  68. #elif HAVE_MEMALIGN
  69.     ptr = memalign(16,size);

libavutil/mem.c:99:5: 
   97.     ptr = malloc(size);
   98. #endif
   99.     return ptr;
           ^
  100. }
  101. 

libavutil/mem.c:100:1: return from a call to av_malloc
   98. #endif
   99.     return ptr;
  100. }
       ^
  101. 
  102. void *av_realloc(void *ptr, unsigned int size)

libswscale/swscale.c:3131:5: 
3129.     SwsVector *vec= av_malloc(sizeof(SwsVector));
3130. 
3131.     vec->coeff= coeff;
          ^
3132.     vec->length= length;
3133. 
