Fix implicit conversion warning
GCC 12.2 reports the following warning:
[3/16] Compiling C object util/cairo-script/libcairo-script-interpreter.so.2.11801.1.p/cairo-script-scanner.c.o
../util/cairo-script/cairo-script-scanner.c:1562:38: warning: implicit conversion from 'int' to 'float' changes value from 2147483647 to 2147483648 [-Wimplicit-const-int-float-conversion]
if (real >= INT32_MIN && real <= INT32_MAX && (int) real == real)
~~ ^~~~~~~~~
/usr/include/stdint.h:123:22: note: expanded from macro 'INT32_MAX'
^~~~~~~~~~
Edited by Adrian Johnson