proj4/standard_fuzzer: Heap-buffer-overflow in proj_hgrid_init

Detailed report: https://oss-fuzz.com/testcase?key=4985382652346368 Project: proj4 Fuzzer: aflproj4standardfuzzer Fuzz target binary: standardfuzzer Job Type: aflasanproj4 Platform Id: linux Crash Type: Heap-buffer-overflow WRITE 7 Crash Address: 0x603000000176 Crash State: projhgridinit...