* cccp.c (xrealloc): Call malloc given a NULL old pointer.
        * collect2.c, cppalloc.c, gcc.c, genattr.c, genattrtab.c: Likewise.
        * gencodes.c, genconfig.c, genemit.c, genextract.c: Likewise.
        * genflags.c, genopinit.c, genoutput.c, genpeep.c: Likewise.
        * genrecog.c, mips-tfile.c, protoize.c: Likewise.

From-SVN: r24806