evas: Fixed warning for uninitialized variables

evas: Fixed warning for uninitialized variables

Summary:
Warning fixed of evas

modules/evas/engines/gl_common/evas_gl_context.c: In function 'evas_gl_common_context_new':
modules/evas/engines/gl_common/evas_gl_context.c:392:32: warning: 'minor' may be used uninitialized in this function [-Wuninitialized]
modules/evas/engines/gl_common/evas_gl_context.c:314:8: note: 'minor' was declared here
modules/evas/engines/gl_common/evas_gl_context.c:392:16: warning: 'major' may be used uninitialized in this function [-Wuninitialized]
modules/evas/engines/gl_common/evas_gl_context.c:313:8: note: 'major' was declared here
@fix
Compilation Warning Fixed

Test Plan: Compile efl

Reviewers: singh.amitesh

CC: seoz, cedric
Differential Revision: https://phab.enlightenment.org/D656